My suggestion to you is to NOT use any forums, not use intermediaries - your best bet is to use a solicitor/lawyer and sue SportsBet.io for their negligence.
Only a lawsuit will yield you a result.
But then again what country does sportsbet.io's office and its staff resides? Wouldn't be that hard to detect and know where they are and issue a case against them, especially amidst this pandemic? I think it was applicable to you as you know where the company resides and was near from where you are, but then if it would take flights and the sportbet was afar from PlayerX47, I don't think it would be worth it, NOT UNLESS, the OP holds huge amount of bitcoins that sportsbet.io refuses to pay.