If you or someone you know gets locked out of your Facebook account due to security reasons and you do not know how to regain access it. You can send email to Facebook at this address regarding issue:
They will require proof that you are who you say you are so you will have to scan a picture ID with your name and photo on it and attach it to the email when they respond to your inquiry.
God bless you! I hope you success in regaining access to your account!