Suggestions for roommate/moral dilemma?

I'm living with a good friend who is not in the most sound place financially. Basically he is used to a higher lifestyle until he was cut off, and wants to maintain that lifestyle with minimum wage jobs. I had to lend him $350 in order to make deposit in May, and I have asked repeatedly him for me to start paying me back, even if it's $10-20 here or there to no avail. I want to cut off his internet, as punishment until he starts making payments. The question I have is, do you think it's a good idea? Or is there another method you would take? I know he is trying to deal with a piling amount of debt, and I feel bad for him, but I am getting sick and tired of him stonewalling me especially since he is not making any lifestyle changes. Thanks!