I have a family member who runs a non-profit organization. They had contracted a social media agency, and one of the things that agency did was make a Facebook page for them.
After the page had gotten some traction, and the contract with the agency was ending, their employee removed himself as an admin on the page in order to “hand over the keys.”
Except he hadn’t made anyone else an admin yet. So the page had no administrator, and because it had strict settings, it meant that literally no one could get into the account.
This page was not big, but it was not small; we’re talking ~50,000 impressions/post.
Over four months, my family member couldn’t get access back to this account. She sent in her ID, some tax documents, a picture of the literal business registration with her name on it (that shared the name of the page). The old administrator confirmed, to Facebook over email, that she was intended to be the new administrator.
Nothing. Facebook left her hanging.
I reached out to a friend of mine who was a dev at Facebook.
Issue resolved in 48 hours. Over a weekend.