Hi I didn't find this casino in our system could you please share the url? When you sent them the documents, were you also successfully verified or not yet? I see they keep giving you the same answer but if they don't have an update they obviously have nothing to tell you.
But waiting a month would be too much for me. I don't know if anything can be done but I would definitely try to file a complaint on these links if it was sports betting as I feel it is.
https://www.safebettingsites.com/complaints/
https://www.bookmakersreview.com/sportsbook-complaint/
https://www.bookmakers.bet/submit-a-complaint/
https://www.top100bookmakers.com/contact-us/
https://www.sportsbookreview.com/sportsbook-complaint/
Let me know if you manage to get the money or how the situation turned out.