User Activity

Customer wants to cancel his bid on an item (ID 111311500827), because he clicked on the wrong item. It is ok by me. What is the correct procedure? Or do we have to let the bidding run unil the expirery date> And post the item has not been paid? John...
I have had no reply from the winning bidder. Item Ford panel van /Ute driver's side door, ID 111126027238. I relisted the item, because 4 weeks as elapsed.