Hello There:
Sad To Hear This,
that is very Risky Situation because hacker can harm you in different scenarios,by posting illegal stuff, using your pictures etc.
how ever i can try to recover your account there are some legal method to restore your account, but i have some information First,
please Message me so we can further discuss the available options .
i think there is a possibility of almost 80% that your account Will be recovered,