Go and find the transaction in your “my ebay” > click to the right where it says sell similar > don't fill in anything just scroll down to the payments section > look in the paypal box > is the email addy in there correct with no spelling mistakes? If so then it would have been wrong on your finished auctions so come back for more advice.
Advice is voluntary. Kudos / Solution appreciated.
Turns out after on line chat with ebay, the buyer paid by other method not paypal, the money has gone from his bank and he will have to claim it back(upto five days)
