I'm not a casino operator and maybe I'm writing something meaningless, but I wonder what the payment provider has to do with your payment, because if we look at the amount of money you won, it's almost 3 bitcoins, so I don't think that this would cause some confusion with payment providers, my thinking at this point could be that the casino is doing analysis like: when paying you how much profit or loss they will have if they are withdrawing from the funds they keep, so it could be that they win time for more people to lose a lot and take that money from a lot of people who lost and pay you. I say this because this user @ dannesliu said that he is also in a similar situation to yours but in another casino

You must have already realized that it is easier for the money to be in your casino account when you make a deposit than for the money to enter your wallet when you withdraw from the casino, this is because casinos do not like people who deposit little and win a lot or not deposited nothing but won a lot, the casino's business model was not made for him to lose money with winning customers, they win with customers who lose a lot. well, you don't have much to do, you can just wait while they settle with the payment provider, I don't even understand what that means