My Domestically Abusive Father

My so-called father is abusive. he kicks us, yells at us, slaps us, if we so much as a say a wrong joke. As I am writing this, my mother is beside me crying. I have an exam in 5 hours. I have slept for 3. My father came at me for no apparent reason. I fought back, shouted back; he kicked me and slapped me. Enough was enough today. I called the police. They said they couldn't help. My father promised me he won't let me study law. because, obviously, how can he have a lawyer in his house while he plans on making life more and more hell for us?

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We are all alone here. None of our family members seem to be of any kind of help. I am not a lawyer yet, heck, I am in only first year of college. I am one hairbreadth away from giving up. I just want to die. Help us, please.