Ok just got this message "Hi, as I said to you I brought this item for my son and I didn't realise that was a wrong one until I spoke to him. So I'm going to wait for the item and then open a case on ebay and return it. I'm sure I'll have the money back guaranteed. Sorry about this." Just to give a little background to buyers "son" comment. Buyer sent me a message the day before asking if there was any thermal paste as he was buying it for his son. I've come to terms with the fact I'm going to have to refund, am i best to tell buyer to just reject it and how long will it take to come back to me?