How do I teach my alcoholic dad a lesson?

My father resorted to drinking heavily around six months ago. He would always drink a little like a scotch before bed. About 2 years after my parents got divorced he started drinking a lot. His own children have called an ambulance for him twice when he drank too much and had too many pills. The only difference between him then and if he were dead is that he was breathing. He was completely unconscious. We also had to call the police when he was scolding my sister and I and when we wanted to leave he started throwing us down and stomping on our phones. He wouldn't let us go to our moms. He also gets drunk every night and calls my mom around 50 times. he switches off between how much he hates her and how he just wants to kill himslef and he says how we all are horrible people. The next call will be how much he loves us all and that he wants to get back together. When my mom tries to hang up he says that he will then drive over and talk to her at my moms because it is still in his name (true but bullshit). It is not unusual for me to be up until 2 in the morning. He not only says that he is not an alcoholic but he says he hasn't drunken in years. My siblings and I had an intervention with him and he went to an outpatient rehab but that did nothing. I now pretty much stopped sleaping at his house but that only makes him more upset. I dont think its my fault though. HELP. what should i do