Far as much as you may have some point in this accusations, you should have at least shared evidence to support this claim because we have seen how rival casinos sponsor fake negative attacks on their competitor all to damage the image and reputation and also to reduce the way gamblers patronize them against their own casinos.
I am not accusing you of such, but for the avoidance of any doubt, you need to supply evidence to show that this casino really has scammed you or confiscated your balance and for what reason.
It's just another case of trying to game the system:
After thorough checking, the Sportsbook team has confirmed that this is another instance of abuse:
Obviously one of the sportsbook tennis abuser. User's betting patterns are not random while trying to game the system such as knowing the live score ahead and placing bets before the odds are updated. Attempted to circumvent block by randomly playing in-house/ casino games
They were able to identify due to similar patterns from previous cases. Hence, the decision is final.