My father's gambling addiction is destroying our family

[Never_give_up]

My father became a gambler these past , I don't know, maybe 8 months. We just learned yesterday as a family that he has lost a huge fortune of money that was in common bank account with my mum. My sister is going to give birth in few days and she is thinking of leaving the house faster than she would. 

The whole family and the husband of my sister told him to stop playing these games, I said to him to go to a center that helps gamblers. All my father said was that he will stop he just wants to play one last time, which is ridiculous. You don't play one time, if you play one time you play again and again. He doesn't want to go to a center or to a psychologist or psychiatrist, he thinks he doesn't have a problem.

My mother made her own bank account cause we know that gamblers may steal money , in some sense he already did that with the common bank account. 

You have to be really low IQ not to know that you can't win in gambling and yet he thinks he can make money.

I can't see my father anymore it's too painful, he is addicted, I can't see an addicted person that doesn't want to help himself and he may end up homeless some day. He lost a ridiculous amount of money. I have a million problems in my life like being autistic, this is the last thing I imagined I would have. 

What can I do?