Take them to small claims court for an amount below the appeal threshold. If they ignore you get a default judgement and ask a sheriff to go to their offices and seize enough assets to guarantee an auction will cover your award plus costs - return the excess to FB.
This has been done a few times and draws their attention.
The downside is for FB, these courts were set up to defeat ignore-trolling by FB, among other things, after all their careful neglect of user problems IS a Trollform...
There's so much snark here... This is not the time to lecture OP and there are better ways to phrase lots of what you wrote. Don't be that person to someone looking for help.
maybe you have better luck