eBay

I feel completely overwhelmed I sold an item and mailed it to the wrong eBay customer , that customer received his $21 train and also acknowledged he received tAnother buyers purchase and he will keep the item and sale it refuses to respond to any me...

I accidentally sent an eBay buyer another buyers package it was a mistake the receiving buyer acknowledged he received it and has made the decision to keep the item and sale it , he is completely ignoring any messages,on returning it . I had to refun...