this isn't the first time I've heard of a case like this some of my friends also experienced the same thing.
If that’s the case, and if you don’t mind, can you please share to us here what happened to your friend’s case? How did it end up for your friend?
There's nothing he can do his account is locked and can't be used anymore and he forgot it, maybe he realized his mistake
from what I heard the account was created just to claim reload without actively making bets and suddenly the account makes a withdrawal of course casinos don't like this kind of activity.
And where is the problem here?
The problem was exactly described by @BitcoinHunt3r. Everything indicates that OP has created an account to claim reload bonus. He tried to withdraw it, or maybe he even managed to withdraw it. The bonus is for users who are actively betting. It seems OP was not enough active in betting to deserve a withdraw of that bonus.