Have you kept the rules in their Terms and conditions and hope you have not been flagged for multiple accounting or gambling from a restricted region. It is hard to believe that the customer care of a big company like stake.com is not responding to mails, they should be more professional than that. You may go to their ANN thread and post your concern there and if they don't respond to your satisfaction, you can go ahead and raise a thread for them on the reputation board. If you're at fault, even if you engage a new reputable casino, you may still face the same fate