I don't see any mention of letting the OP to withdraw the deposit. Where am I missed?
OP confirmed they can in the OP.
You can withdraw the deposited sum only."
And the casino representative confirmed it in their reply to the player:
You can withdraw the deposited sum only.
Although it's not clear to me what exactly the player did wrong (looks like that was the casino reps intention to not provide too many details), the fact that he is banned or limited on multiple other platforms makes me not want to trust OP. If he believes he was treated unfairly, he should get a mediator involved and see what they say.
Having been banned/limited on casinos 1, 2, 3... doesn't mean he should be on casino 4 as well, but I am starting to see a pattern.