To report a problem with something you bought with a credit card:
Reference: [Details of your complaint and card number xxx]
On [date], I bought [item] from [retailer] using the above card.
The [item] has proved to be [faulty/ not as described/ not fit for purpose] because [explain problem].
I have tried unsuccessfully to resolve this dispute with the retailer and am now looking to you to pay me [set out what the sum you are seeking e.g. the cost of repairs] or [to provide a refund].
I base my claim on Section 75 of the Consumer Credit Act 1974 which makes you jointly and severally liable for any breaches committed by the retailer.
I would be grateful if you could respond within 14 days