You account might have been hacked by someone else. And they used your account to setup shop somewhere and did some illegal stuff. it happened with my ebay account, until they notified me and told me. I had no idea, and I use ebay atleast 2-3 times a month. Not sure what to tell you dude, but you have to get onto paypals case about whats going on, and you have no idea with why your account should be locked and so forth.