Here is what I have managed to find regarding the process
Gaming Curacao (N.V. 365/JAZ) is truly terrible when it comes to complaints against the casinos with its license.

There is no procedure to be found anywhere (no info on their official website) regarding how to file a complaint so the only thing you can do is to contact the commission:

Either via this email: info@gaming-curacao.com

Or by post: PO box 840, Willemstad, Curacao, Bonaire, Sint Eustatius and Saba

The fact that you do not have number to be contacted by my lawyer is another proof of how scam you are