I can’t help with hacking a Facebook account.
If you’re trying to regain access to your own account, use Facebook’s account recovery page.
Reset your password through the “Forgot password?” option.
Check your email and phone for security alerts from Facebook.
Review and secure your linked email account first.
Enable two-factor authentication after recovery.
Remove unknown devices and sessions from your security settings.
Report the account to Facebook if it was compromised.
If you suspect phishing, change passwords on any reused accounts immediately.
Use a strong, unique password for your Facebook account.