Can't stop once I start

Hi, I seem to be tempted to gamble whenever I have money available or the casino offers free play money or turns. I am addicted to playing hi roller slots and have lost much money and put myself deeply in debt. I am seeing a gambling counselor once a week, but have slipped three or four times in the past few months, only to become extremely depressed with quite a bit of self hatred. The trance that I find myself in when I enter a casino is very costly. How do I stop this never ending cycle. Help!