Actually not.
When I look at the payment processors, they are based in Great Britain. You can put pressure on them with a lawyer and ultimately take action against the casino. In Germany, it was not clear for a long time whether Curacao casinos could be sued, but now things are moving forward and the first judgments have been made.
If you really want your money back, you'll sue. If you haven't achieved anything on your own for 6 months, you won't achieve anything on your own in the next 6 months either.
And again to the question from @barborasp:
You file a lawsuit in the court where you live. It doesn't matter where the casino is based. The lawsuit is filed where the player had access to the casino.
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