Need to reclaim a page, here are instructions on how to do it: https://www.wikihow.com/Reclaim-Admin-Rights-to-a-Facebook-Page
Rogue admin may delete the whole thing as a retaliation.
Do you know if Facebook keeps automatic backups?
Asking to know what are my options and evaluate various gameplan scenarios.
(feel free to contact me directly if you know how to help)