Send to a Friend

We were double charged for something on Ebay (paid via Paypal), how do we go about getting our money back?
Went to pay $200 for an item on Paypal two weeks ago. Clicked the “pay” button twice as it seemed as though it didn’t go through the first time. Amex bill came back and both charges were on there. We contacted the seller a week ago and he hasn’t gotten back to us. My partner notified Paypal about the double charge. Still waiting to hear anything from them.
Anything else that we could do?
Using Fluther
or