I read the whole OP and I have to say this looks very dodgy from the side of Coins.game
Taking away all winnings without showing clear evidence. Looks like they are just free-rolling you. Take your funds if you lose and maximum pay back your deposits if you win. That is the lowest trick a sportsbook can pull on players. Clearly they don't care about their reputation and all they care about is money. Let this thread be a big big warning for others.