Just got an e-mail from Amazon stating they have refunded the amount of money I paid more than the current price of the set in their webstore. I did not ask for this (just tried to cancel my order), so a kind gesture from them. (Although Bookdepository has it for €10 less)
I placed an order for a book that was a mistake. I contacted CS immediately and they sent the typical "already sent to dispatch" reply which I think is just their standard reply (this wasn't amazon but another retailer). The other thing that amazes me is how easily these sellers give away free book. I have several "New" copies that arrives soiled and the companies just refund and tell me the donate or keep the book.