Fix a Login Problem
Recover Your Facebook Account if You Can’t Log In.
Troubleshoot login with a phone number on Facebook
Find your account from the "Find your account" page
I have to enter a security code every time I log into Facebook.
Unable to reset password because of password reset limit
Problems with resetting your Facebook password
Recover Your Account If You Can’t Access the Email or Mobile Number on the Account
Get Help From Friends
Contact the friends you've chosen as trusted contacts to get back into your Facebook account