I saw a car on a dealer's website. I spoke with him and he asked for a deposit to hold it until I inspected it, which I did within a few days. He said that the deposit was non-refundable. His website states, "Under the Consumer Contracts Regulations (2015) for distance sales only, you have a right to cancel an agreement in writing within 14 days and obtain a refund". He now refuses to refund my deposit. What does the law say?