A huge win like this sometimes gets reviewed by the gambling site. and when an investigation happens it can last up to 30 days or perhaps even more. sadly all you can do at the moment is wait.
aside from the screenshot, you shared, would you mind also sharing the conversation you had with their support?
And so every time -
https://imgur.com/a/S1Fv6oII would not say that this is a big win at a bet of 200. And besides, I withdraw only 10,000 dollars left after losing.