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In this article
Problems with gas and electricity bills, smart meters and poor customer service are the most common issues we hear from energy customers.
Below we've set out the specific complaints we hear about most often, plus what you can do to help solve them.
Get to know your rights, and learn what you can do to minimise the impact if you've experienced a problem with your energy supplier.
Compare prices and contracts with our free energy comparison tool or find out how to get the best energy deal.
If you pay for energy by direct debit, you pay a fixed amount to your supplier each month (or quarter). This isn't the same as your bill, which reflects the actual amount of energy you use, and will be deducted from the balance on your energy account.
To work out what to charge you each month, energy firms estimate how much they think you will use over the year. They divide this by 12 (or four) to determine your monthly (or quarterly) direct debit amount.
Over the summer, you might pay for more than you use and end up in credit. But this typically balances out when your energy use increases over the winter months.
Your energy supplier might up your direct debit if you're using more energy than they estimated, or the rates of your tariff change. This happens when:
Your energy supplier should tell you if it is increasing your direct debit and explain why.
Feeling the pinch with energy bills? Read our tips to cut your energy costs or how to get help if you're struggling to pay your energy bill.

Use our home energy planning service, powered by Snugg, to get personalised advice for a more energy-efficient home and lower bills
Start your planWe sometimes hear from people whose bills feel much higher (or lower) than expected.
If you haven't had an energy bill in over a year, energy regulator Ofgem's back-billing rules might apply. They suggest that customers can't be billed for energy used more than 12 months previously if they haven't had a bill for energy use, despite asking for one. The rule is meant to protect customers from getting a huge bill in one go.
If you ask your supplier to investigate a problem with your meter, they have five working days to:
If they don't do all of these in time, they owe you £40 compensation within 10 working days.
If you think your meter isn't working correctly or has a fault, keep reading for more tips.
Find out how to complain about your electricity, gas or energy bill, and a letter template to complain if your energy supplier overcharges you.

The first thing to establish is which of the following is having the problem:
It's an important distinction because the monitor may stop working while the smart meter itself continues to work fine, recording your gas and electricity use as usual. Though it can be very frustrating.
Our dedicated page on smart meter problems and how to solve them sets out what to do if:
If you rely on your smart meter to charge you correctly for a time-of-use (TOU) tariff, there's a risk that your supplier will struggle to bill your accurately for the period while your smart meter was out of action.
Alert your supplier as soon as you notice a problem with your smart meter if you have a smart TOU tariff.
If possible, we're recommend taking your own manual meter readings as much as it is possible to do so and uploading them to your account, plus keeping a personal record, to minimise the risk of inaccurate bills.
If you report a problem with your smart meter, your supplier must tell you how it plans to resolve it within five working days. If it doesn't, if owes you £40 compensation, which should by paid automatically.
Find out more about smart meters and time of use tariffs.
If you suspect your meter is faulty, record regular meter readings to help prove your case. If you have a smart meter taking daily meter readings then you might be able to track your usage in your online accout or app.
Gas meters approved under UK law must be within 2% accurate and electricity meters within +2.5% and -3.5% accurate.
If you suspect your electricity meter is faulty:
If you suspect your gas meter is faulty:
If you have a smart meter, you can use your in-home display (IHD) to help check your near real-time energy use. It isn’t a fool-proof way of checking meter accuracy, but it can be a helpful guide if you already have suspicions.
Contact your energy supplier if you think your meter is faulty. It has a legal obligation to ensure all gas and electricity meters are accurate, so they must investigate.
Your supplier might ask you to do some checks on your meter. It might install a second or 'check' meter or carry out tests on your meter. Suppliers might ask you to pay for these tests if your meter is found to be accurate. Check you're happy with the costs before you agree to any testing.
If you're having a problem with your payg energy meter, check our dedicated prepayment energy meters page.

Whatever the root cause of a problem, prompt and satisfactory responses from a supplier can make all the difference. Unfortunately, we often hear about sub-par customer service which can be exacerbated when an energy customer is in a vulnerable situation.
See the best energy providers plus what it takes for an energy company to be a Which? Recommended Provider.
If your energy supplier has been switched without your permission, your supply won't be cut off and there are rules that protect you. Sometimes the first customer hear is a surprise welcome email from a different energy firm, or a final bill from their current firm.
If you've tried to switch supplier and it has been refused, or taken a long time, it's worth checking what has happened.
If you didn't plan to switch energy supplier:
If you tried to switch energy supplier and it was refused:
You may be eligible for compensation if something goes wrong with your switch. Energy firms must pay customers £40 if:
You can get an extra £40 if:
These rules are set by Ofgem. If a supplier goes out of business, different rules apply.
The compensation is automatic, although you may need to tell your energy supplier about the problem.
Energy suppliers should set out how to complain to them. Check your supplier's website, or the back of a recent statement. Here's what we'd recommend:
Find out how to contact the Energy Ombudsman or complain about your energy supplier in Northern Ireland.
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