Anyway, no one is thankful when a casino confiscate winning which is legitimate. When you are caught on shady activity then they have full right to play by their own terms. And most of the casino confiscate everything including deposit. I think this forum is the place where we suggest casinos to return the deposit at least.
Just because the case does not seem going in your way, don't conclude a wrong conclusion. If you are not still happy with the case how it has ended then seek legal action against the casino. No one here is your lawyer.