If your Facebook account has been disabled, you'll see a special message when you try to log in.
Facebook disables accounts that don't follow the Facebook Terms. Some examples include:
• Posting content that doesn't follow the Facebook Terms
• Using a fake name
• Impersonating someone
• Continuing behavior that's not allowed on Facebook by violating the Community Standards
• Contacting other people for the purpose of harassment, advertising, promoting, dating or other conduct that's not allowed
If you think your account was disabled by mistake, you must appeal Facebook's decision.
See the links below and they will guide you into getting your account back: