The average customer that a casino bans is because they violated the ToS or did something that was considered deceptive to the casino. Then my question; How can you help them withdraw their money if they have won a lot and convince the casino that the customer has not violated the ToS?

Casinos will usually block such users and freeze their winning - then you offer them a service to withdraw all their money?
I hope someone thinks logically about your service - so I think you and your service are suspect. Your Telegram username also change frequently - then you just wake up from a long period of inactivity and change your account password.