[Your address and contact number]
[Reference: details of purchase]
I purchased [item] from you on [date]. When I bought it, the sales assistant explained that the [item] was reduced because it had [details of any faults brought to your attention].
I subsequently discovered that the [item] has the following additional faults: [details].
When I returned the [item] to you, you refused to accept it stating that under the terms of your sales returns policy, no refunds will be given.
The Consumer Rights Act 2015 makes it clear that any contract term that attempts to exclude or restrict my statutory rights will be unenforceable.
The term you refer to has the effect of taking away my right to reject goods that are defective and therefore is unfair and unenforceable.
I would invite you to reconsider your decision but should warn you that should you not be prepared to provide the refund I am entitled to, I will be forced to take court action to recover this sum.
Furthermore, I will report your contract terms to Trading Standards.
I look forward to hearing from you.