To simply put your issue in summary. They didn’t plan to pay even with this mediator shenanigans since they already have a verdict on your case regardless of the result.

By simply judging their action about permanently ban you due to the match fixed which they assumed. This casino doesn’t have plan to negotiate this but rather they are just finding a way to finally get a support. They failed to gain it using forum mediator so they will just keep looking for other mediators to delay this issue until everyone forgotten already.

@Efialtis feedback is the only good move here and will serve as receipt about this casino action.