They are hopeless.
My wife had a bad buying experience. She won an auction, paid right away. Seller shipped item very late, no communication - so my wife left them negative feedback saying so......Wow, they suddenly lept to life then......anyway she got a real nasty feedback in return, completely unwarranted, she did her part and paid immediately.
Anyway.....She asked Ebay to have it removed......hahahahahahah
And as for their fraud protection.......sheesh, don't get me started