ZotaBet Casino - 一般ディスカッション (5ページ)

If you feel like you're not getting anywhere, don't hesitate to file a complaint.

As for what the casino wants from you, I would simply explain to them what you just said here: that you have a job and that's where your money comes from. Or that you have a savings account and that's where you transferred the money from. I'd say that's pretty common.