Glad to hear that your withdrawal has been processed even the consequence is that your account is banned, we can't refuse your opinion about support service because it is a fact. You are lucky to get a full withdrawal while in other casinos they may only process based on your deposit while winnings will be frozen or withheld. By the way do you know the reason your account was banned? because it is usually related to illegal activities and we know Blackjack.fun has many weaknesses that can be exploited, I don't think they banned you for no reason especially you are one of the high rollers which of course every casino needs.
I don't know since I don't have any feedback from support. I play relatively rarely in the casino and only occasionally if a good promotional offer comes up or to catch a few cents in a competition.