Clinics or professional help wont really be that affective if a certain gambler do have that severe addiction.He wont listen to anyone for sure.
To treat oneself then everything should really be realized on what are the things would be mainly affected if they do tolerate such addiction.
Not only financial aspect but also on social or family relationship would be destroyed.Gambling industry is really become profitable due to this behavior.
In any case, the family needs to save the person somehow, so they will try various ways to wean the person from excessive gambling.As it is, I do not wish anyone to have such a family member.