Facebook account don't get deleted because they were hacked.
If it was deleted, recovery is impossible.
What is the message you get when you try to login?
If your page is no longer online for everyone to see, you are right, your account has been deleted. Check that.
If deleted recovery is impossible. Someone must have had access to your personal login information.
Mind you, it take 15 days to delete an account, so if you did not access your account during those 15 days, the account may have been deleted.
I am terribly sorry but I do not know of any way to recover a deleted account; now it is as if it never existed. I wish I knew of a way to help you recover your account.