My sister's Facebook account was hacked, and the hacker is messing around with it...
GetHuman741765's customer service issue with Facebook from June 2018
Help with my Facebook issue
GetHuman741765's next move: find and follow the right step-by-step guide.
Facebook doesn't have a customer phone number that is answered by an agent. Instead, GetHuman741765 will need to dig through the advice provided by Facebook, other customers and consumer advocacy websites like GetHuman. Here are some instructions we've written for similar issues- hopefully GetHuman741765 can let us know if they help or not.