Sorry to hear that. You will have to go to a site such as Ask Gamblers for help. Going the legal route won't get you anywhere other than wasting money on a lawyer. No one has ever won a court case against a book in Curacao or Costa Rica. Most of the books in Curacao and Costa Rica are honest since they don't want to hurt their reputation. All my play goes through books in CR and Curacao. Unfortunately there are dishonest ones too. There are a couple of review sites that help gamblers. That's your only discourse.
I think there's no help for him, check his trust rating... and spamming around the forum and other review sites is in vain:
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This situation was made even worse by OP trying to pass a variety of suspected fake identification documents as his own, all of which were rejected by our integrity team. This resulted in a block of your account. You sent us 4 different ID's all of them with different names, different numbers, and even different nationalities and places of birth.
It's something very fishy here...
I don't like KYC, I don't remember the last time I had to do it... I play in several casinos for years and they never asked for KYC, but I am a fair player! In case I win some crazy high jackpot and I need to do KYC I will do it, it's not a big deal, but I will always pass it if I can.