Of course fraud isn't justified (which FWIW xiaoma in no way claimed), but if you completely ignore a request, it's not really a surprise if people go over your

Of course fraud isn't justified (which FWIW xiaoma in no way claimed), but if you completely ignore a request, it's not really a surprise if people go over your head and contact Amazon. "I requested a return and seller is ignoring me" may well end up with Amazon issuing a refund regardless of what your return policies say, whereas just responding with your policy details may well end the matter there (assuming the buyer isn't fraudulent). I had something vaguely similar with Play-Asia about a year ago. Part of an order arrived damaged, and after three weeks of back-and-forth with support was no closer to receiving a replacement item or refund. I ended up filing a PayPal complaint (specifying that only part of the order was in dispute, and that I was only seeking a refund on a single item), but Play-Asia completely ignored this -- PayPal issued a refund on the entire order as a result. BTW, why did the buyer wish to return the item? If the item had developed a fault, I'm not sure his claim of "Item not received" is _wholly_ unjustified.