https://bitcointalksearch.org/topic/recovering-hacked-accounts-or-accounts-with-lost-passwords-497545
Try to find some old posts from before it was hacked where you posted
your BTC address. You'll need one to prove you are the owner of the address.
(use the search feature)
If you need help signing a message check here:
https://bitcointalksearch.org/topic/how-to-sign-a-message-990345
Goodluck!!!
Wow, I forgot about address signing.
Thank you for the help.