Unrefunded money from PayPal

I was refunded $60 in November last year. The seller sent proof of payment to me showing a refund deposited into my PayPal account. After sending numerous emails, bank statements, and IDs for both refunds I am still waiting. My PayPal balance is $ 0.00, so I am not even able to buy anything using PayPal. I was referred to my bank. Was informed no money was waiting to be released, and they stopped dealing with them. I was refunded via PayPal, and to date, I have not received my money. No response to emails.....nothing. As far as I am concerned, my money is missing, and PayPal is not taking accountability even after they received proof of payment from the merchant in the US. R1000 just gone into thin air, sitting in their PayPal account unrefunded.