Im sorry for you but it's your own problem you have to wait till he accept the trade but you can report him because he sell your account :
[Only registered and activated users can see links. Click Here To Register...] !!!
But I think ePVP wont give you his IP adress because you don't trade above epvp :)
But it's helpfull for other traders that you warn us from him :)
DON'T FORGET TO REPORT HE SELL YOUR ACCOUNT !!!
Couldn't you start a complaint with Z8-Support !? Tell them he hacked your account