Can I sue eBay/PayPal for being a victim of a scam through their "seller/buyer" protected advertised sites

In early November I starting selling Bitcoins (online digital currency) on eBay. eBay assured me that sellers were protected and even had the "seller protection symbol on the listing". I was selling these bitcoins so fast that in a 3 week period my PayPal balance was around $9000. The more people I sold, the more I bought to keep inventory stocked. Everything was going great until I received a dispute from PayPal that one of my transactions was removed due to the buyer using a hacked account. One by one the disputes and charge backs kept coming until my PayPal account was -$850. And to top it off ebay charged me hundreds of dollars in seller fees. Not only did I lose a lot of money but the product as well. I received no help from eBay/Paypal or anyone. In fact the customer service was just plain rude. I find out that this scam has been going on for a while, yet these 2 companies allow it to continue. Is there anything that can be done to recoup the losses?