Very often to achieve a good result in something you need to spend a lot of effort and time, but I am sure that if a gambling addict has a sincere desire to get rid of gambling addiction and he continues to work on himself even after unsuccessful attempts, he will definitely achieve his goal.
Getting rid of gambling addiction is a very difficult task, so such people need all the support they can get.
That will be back to the gambling addict to cure his gambling addiction because other people can't force him to go to rehabilitation or doing something that can reduce or even cure his gambling addiction. That will not easy for those people who had gambling addiction because they must block their minds that keeps telling them to playing gambling. If they trying to build their power to prevents the will of playing gambling, they will see that they still have a chance to cure their gambling addiction.
With a helps from other people and trying to create a list of he can do, that will helps them to start do one by one the activities so they will have a chance to distract their minds to playing gambling. With consistently doing many activities on their daily life, they will see that many activities that they can do and have fun with it.