Delaying my withdrawal with excuses

I have won 5501 EUR in this casino.

First withdrawal I made, they came up with that I also needed a selfie next to my ID, even when I was confirmed with all documents (KYC).

After that, my first withdrawal was paid after this casino aborted it 3 times. Now, when I won 5501 eur, they haven't even done anything.

There is also a limit of 1000 eur per withdraw so I asked if they could fix it soon. Now it's been 5 days since I made the first one.

The customer service says that the relevant department has reviewed it now, but nothing happens.

Please help me to solve this case against an unserious business.

Also got an answer yesterday that I uploaded to the files