For now, it looks you don't have any good option as a mediator of your complaint. And I guess Bitz.io team isn't going to reverse the decision as they have already paid you more than your deposited funds. I have checked some of your bets, those have a very little odds different compared to other platform. Betby is the odds provider of Bitz.io, and they are saying that the decision has come from their odds provider. Have you placed bets on any other platform where the odds provider is same?