Harassed by alcoholic father what can I do

My father has been alcoholic for as long as I can remember. My mother and me were severely physically and emotionally abused as I grew up and he still does it. I'm 26 yr old with personality problems and anxiety and studying psychology and my needs are met by my mothers 10k/m income who works hard even as she is diagnosed with trigeminal neuralgia. He earns nearly 85k+ per month but there is hardly anything to show for it apart from basic ration every month. He is wasting away his income and I want to know how I can force him to responsible financially using legal means! Christian Family here.