Yeah its sad because I've deposited over 15k on this site and always had a problem when I need to cash out large amounts. Should have learned by now :\
Another reason that when you wish to gamble huge amounts of money, you shouldn't do that on an online casino. 20K is probably much more than what they will ever earn through normal means.
Start a scam accusation with all the proof, and also post on other sites to bring it to other people's attention.
Not enough rep if someone helps me get this withdrawn I will personally give them a free btc!