Hey mate.. sorry to hear about your story.. i've heard a million like that.
Here's my practical advice:
1. See if the casino has a date on their T&C. They should. If so, see if that maybe they added that 30% amendment after your withdrawal request. If so, you're in luck and you can prove you didn't do anything wrong. Take a screenshot and send their finance department.
2. If not (most likely) - take their offer and run. You will not get your 35K in any way, shape or form. There is no police to report to as you don't even know what jurisdiction they belong to and no license means that it's basically the wild west. If they are offering you money which is equal to or more than your initial deposit - take it.
3. Don't play there again.
Good luck!