Dec 16, 2017, 19:0512/16/17
Hello! How exactly your account was lost? Was your Facebook account banned?
In this case, you will have to contact Facebook directly and ask them to recover your account. They have a special process of verification, so I hope they will be able to assist you.
Please check this link in order to contact Facebook support team: https://www.facebook.com/help/103873106370583
Have a good one!