I have just receiver an email from PayPal, here is a portion of it
We have concluded our investigation into your case and have decided in yourfavour. You have indicated that a partial refund of 0 would be satisfactory. If the seller's account has insufficient funds to complete the refund owed to you, please be assured that we will take appropriate action against theseller's account, which may include limitation of the seller's accountprivileges.
I agreed to no such thing