I don't fully understand your question, you gambled won and withdraw the money from the account? And now you would just like to close that empty account to not be tempted to gamble again? So it's some kind of exclusion from the casino? I can understand the casino that they don't want to close your account so quickly after opening it. If it's written in the terms and conditions of the casino then there is nothing you can do about it. But why not just wait the 90 days and then ask again to close the account? As long as you don't have any money on the account you shouldn't worry about it. Another way is to change the password in a long phrase that you can't remember and don't save it in the browser. Like that you won't be able to ever login to the account.
In my opinion, in order to no longer be tempted by gambling, we have to be able to find activities that are not related to gambling activities, but this is not an easy thing for us to do. If we still want to gamble, we have to fight the urge to gamble by continuing to do activities that are not related to gambling. gambling and we also have to avoid environments where there are gambling activities, I am very sure that you can get rid of the desire to gamble slowly.
Distracting yourself from other things is recommended because this can degrade or reduce your interest in gambling, but on the other hand, I understand that it cannot be that easy to do so, and the reason is because there are so many things that look tempting in gambling that can make it difficult for us to completely ignore this activity. On the other hand you have said and told one of the keys, which is that quitting gambling activities really requires willingness and openness from yourself and you have to really make sure that you have strong intentions and determination to quit, because I see many of those who say they want to quit but it turns out that it's all just nonsense or means they don't take any action to encourage their desire for change. And this means that we must really have or put firmness in our determination and willingness to stop along with taking some actions that can help us get out of gambling, as you said, namely by avoiding environments that smell of gambling, or that means avoiding some friends who like to gamble or other things that have the potential to make you curious about gambling again, this will not be too difficult to do if you really have strong intentions and determination.