Glen, firstly let me offer you my congratulations on your big win. BetAt has some of the best support team out there, and is well regarded here at Casinomeister, and accredited.
Please keep in mind that it has only been less than a week.
While it may not be common to be asked for notarized documents, it is also not common to be withdrawing close to six figures. It is much more likely to be requested for a large sum.
You will not be paid without it. It is in their terms to be able to request it.
I am a mental health consumer myself, although my issues are different than yours. A few years back, I had a large win that was anxiety producing until I had received it in full. The casino did a great job of holding my hand through the process.
Whatever challenges you face with your life, it is not the chat rep's faults, the manager's fault or the finance team's fault. They do not deserve to be called names, or pestered endlessly. I think I would lock you out of your account pending passing security screening if I was the boss of those people. That doesn't mean anything happens to your balance, in fact, it prevents you from reversing and gambling it away thinking I could win more.
You could still communicate via email. Don't expect more than one response a day though, no matter how many you might send.
You are also not their only customer. Be considerate of their other patrons please, and that includes me.
If you did not open multiple accounts, get your documents in order, get them notarized, and send them on to the casino.
I know it is hard, but try not to panic. Speak to your doctor, maybe they will want to alter your medication, especially if you are having suicidal thoughts. Crisis counseling is surely available too. This casino is one of the good guys.
You might be wise to take yourself to a Gambler's Anonymous meeting. Sounds like it has created problems for you in your past, and it is very easy to go on tilt when you have a big bankroll.
Set up a meeting with your bank too, so they are ready to receive the incoming wire, and discuss perhaps purchasing some kind of annuity or GIC.