Someone hacked my Facebook! Please help! :(

Hi, a hacker recently hacked into 4 accounts of mine, 2 being Facebook and my gmail account. The hacker deleted my email account completely so I can't access it anymore. He also hacked into my facebook account and changed my password. How can I get back into facebook? I do have another email account, but it's not linked with my facebook account.
I will answer any personal question that I need to to get back into my facebook account.

Please help! Thank you!!