There is no locked balance in his account, and his withdrawals are unlocked. However, we terminated his account because of threats and bad behavior. I did give him the benefit of the doubt and warned him a couple of times to stop, yet he didn't.
It was difficult to read the conversation as your screenshot quality is a bit low. I can see that you had warned him to stop that, but he continously complained about the bonus calculation system. He was banned from the chat and discord group of 500Casino. Banning him from the live support system would have ended the issue there, isnt it?
500 Casino reserves the right to suspend or terminate the User's account at any time and without notice, at 500 Casino's sole discretion, in these cases:
User has engaged in abusive language and behavior towards Support staff
Terminating user account for such reason is a rare thing in gambling site. I haven't seen this type of rule at any other casino.