I sold a iphone4 on ebay a couple of weeks ago sent it via recorded delivery so knew it was going to get there. then the guy opened a dispute against me saying he hasnt got the phone. so i sent him the tracking number and pictures of the receipt and screen shots of royal mail saying delivered. then whilst i was in the ebay resolution centre i clicked issue a refund instead by mistake.... is there anyway to cancelling the refund?! please help.