It is very hard for anyone (even if he is willing to provide his services) to go through this route since you have already mentioned that
May I know the reason of their decline (if they provided any).
It will be good if you can make a detailed post (on individual case bases) about the exact reason casinos provided you for not paying. I have a hunch that there is a common issue. Try to include as much details as you could including screenshots of conversations, deposit receipt, etc.