Upon reading the conversation, I do think that there is something wrong with the casino. If we notice, the support keep on saying that @OP breaks their terms without revealing what terms of the agreement is broken. This is a simple saying that the casino is scamming @OP of his money. The casino support should identify and tell the offender of his offence not just saying he broke the rule. If @OP broke the rule, they must specify which one it is but it was never been specified, I agree that you should escalate this matter and share this to askgambler and have them investigate your case.
Im not siding with casino here but most of the cases like this that newbie magically turn small amount to 3 grand or more always involves cheating on the casino games. The casino is relative new which is always being target by abusers since they knew it has a weak reputation.
With the amount of deposit of @OP ($1k+) getting 3k winnings shouldn't be a problem, it is just two or three times of his deposit, and in gambling it is not news to have it 2x or 3x when you are winning, not because an account is winning they are cheating the casino. Oftentimes, a newly created account has this beginner's luck where they win a good sum of money.
And if the casino accused the player of breaking the terms, they must specify which of the term is broken but sadly they did not.