I have found a solution to log into my Facebook account, and it might be helpful for you too. Step 1: If you have another Facebook account without two-factor authentication, link the phone number of the problematic account to your other Facebook account (that is logged in on your phone) as your personal details.
https://www.reddit.com/r/facebook/comments/1b7zdet/i_have_found_a_solution_to_log_into_my_facebook/

