I know it's a bad thing but gambling addiction is your own decision and the only thing that can help you with this is yourself,lucky if you have the support of your families, and they will help you get rid of it. but when you don't have it, you need to help your self.because there is no one else who can help you but yourself in any kind of addiction.
It will start with you, but later on you will need the help of your family members battling it. It's called addiction cause those addicts are already on the point where they can't control themselves. Family members should help them and try to talk to them, or bring them to a professional will surely be the answer. Addicts will not wake up in the morning saying that it's enough and I won't do it again today, maybe they think about it, but the action will be different cause they are addicts. Help from other people will help them to push themselves to be better.