And you can opt to be banned from wherever gambling site/house you play. This way you can be sure that you can't play whatever happens
How do you want to do that? You will ask site admin to ban you or you do something which site can ban you?
But if you change mind then you got many ways to play again with a different account so if you want to stop then you should mentally need to prepare first. If you decide then no one can influence you to gamble again.
The decision should be coming from us, we have to quit if there is really a need and don't expect the casino will ban people who keep giving them money,, they are operating for a profit and they want to maximize their profit to our expense. Always remember to play for fun so you will not be in the situation where you are so desperate to stop but you cannot do it by yourself.