It irritates me when I see people suggest a campaign manager to contact when a scam accusation has raised for a company. Hhampuz is just the campaign manager and he has no obligation to involve in such cases.
Hhampuz doesn't and shouldn't get involved in solving a case like this because if he isn't working for the casino and its security/integrity department (whatever you want to call it), he can't possible know why a player's withdrawal is delayed. But, he might be able to directly contact people in more senior positions in the casino. Like those he negotiated with when it was arranged that he would manage their campaign, or those responsible for filling the campaign wallet with coins. And that's the people who might help and provide some more clarity.
It may look like using them as mixer although I don't know how risky those bets were. Casino's are not meant to be a mixer.
All casinos or exchanges could be considered mixers in a way. I am not going to go into the privacy aspect of that mixing though. You deposit one UTXO at an exchange, make a trade or two, and withdraw something else.
Casinos have rollover requirements. For example, If you deposit a certain amount of crypto, you need to wager them at least once and maybe respecting a minimum odds requirement before you can withdraw again. If those requirements are met, the player has fulfilled the conditions to be able to withdraw his money. If a casino doesn't like that, they should change their rules and require a 5x or 10x rollover requirement and see what that will do to their business.