Help! I listed a 1988 Peoria Chiefs Minor League set on eBay, which sold yesterday (one bid). When prepping the item for shipment I noticed one of the cards was damaged b/w the isting and now (wife was selling books and crunched it). I disclosed the damage to the winning bidder and he/she stated that given the choice... they would just assume forget the whole transaction. HOW DO I MAKE THAT HAPPEN?? I have searched for over an hour on eBay and cannot figure out how to do this... Thank you

PS I tried cancelling the bid, but b/c the auction has ended it wasn't allowed.