2 core attributes of Bitcoin are working against you:

1) Totally irreversible. No chargebacks.
2) Near-totally anonymous. Anonymous enough that you won't know who it was unless they stupidly have the address they used to steal your coins in a sig on a forum somewhere.


tl;dr You're fucked.


This is why we tell people not to keep their money in exchange accounts. Move your coins (most, at least) into your local wallet, encrypt it, and make over 9000 backups.