Page hacked, name changed, unable to rename it back

Please advise me what I can do to change my Page's name to its original after it was hacked. I am the only admin to my page. Someone changed its name and now I am neither able to change it back, nor to unpublished it for the moment before resolving the issue, nor contacting Help center that is actually a robot that does not offer any option for my case and do not reply any questions.