One of the main tricks is to claim you are scamming them, even if you aren't. They can demand KYC from you, and then keep rejecting it always you send your personal documents, or they can claim you are using multiple accounts on the platform to take advantage from it. When a casino wants to play dirty with players, they will always find an excuse to difficult the whole process and never let the gambler withdraw his funds. That is why casinos which such histories must be avoided at all costs by gamblers.

And in case you face a situation like that, I fear you have to be patient and follow all their instructions, while creating and sharing the situation in a public thread on this forum, for an example, so other members will also pressure the casino to solve the situation as faster as possible. This strategy can work, because the casino will fear to lose their reputation, so they will feel forced to not create any further issues with the withdrawal requirement.