I'm so sorry to hear what has happened to you, these people are really dishonest! I'd report her to ebay or paypal, for what it's worth, and hope that some kind soul in ebay and paypal will do something about it (once in a very very long while, you do come across such nice ebay/paypal employees, but unfortunately most of the time...), but if nothing comes out of it, I'd try to let it go. It's easier said than done, I know, but I wouldn't try to take it further from there or lower myself to her level. Take a deep breathe, relax, make a conscious effort to forget about the whole matter, then do it! Pls don't let this consume you, it's not worthed it