I attempted to log in to my facebook account and someone totally hacked the whole thing and I cannot even get into my email to prove my own real identity. This person changed my password, my profile pic to theirs ect.) What can I do?

This happened to my daughter recently. Someone hacked into her account and posted a bunch of pictures of boobs. She had to contact Facebook and close the hacked account and then started a new one explaining what happened if they happened to see boobs on her profile. 😒