If someone hacked your Facebook and changed the email and password, go to Facebook hacked and follow the recovery steps +1ー833ー611ー4101. If you can't log in, click "No longer have access to these?" and submit an appeal with your ID. Check your email for security alerts from Facebook.
https://philpeople.org/profiles/what-if-someone-hacked-my-facebook-and-changed-my-email-phone-number-and-password-prevent-further-steps-hacked
https://philpeople.org/profiles/what-if-someone-hacked-my-facebook-and-changed-my-email-phone-number-and-password-prevent-further-steps-hacked