Sometimes it is very important to stay calm and patient when the casino is not accepting your withdrawal request, or asking you for an extra verification, you need to wait a little bit, especially when it comes to a huge win and large amounts of money are involved.
In your case for example, I liked that you didn’t just start accusing the casino of scam and warning people for absolutely nothing, I hope all other members here in the section before opening massive numbers of accusations against casinos, first of all they can try to contact the support and wait for the response, ask for reasons and try to understand what’s wrong from your side first.

Anyways, congratulations for your massive win and you should enjoy the profits responsibly and gamble with moderation.