Aks HN: Recover FB account your org owns

Heya, I'm part of a small group in a larger political organization. We had a Facebook page with a lot of content, but the admin went AWOL and we don't have access any longer. I can receive mail at the officially listed email address and snail mail at the officially listed postal address. I also can send requests on offical stationary.

Is there some way to get attention of a human at Meta?