My issue

I am a 13 year old girl. My family consists of 4 members, my brother, my mom, my dad and me. My dad has been physically abusing me since I was around 7-8 years old. He also used to hit my mom. My brother, once tried to defend me by hitting my dad. My dad also verbally abuses me because of my weight. He is constantly on his phone and watches dirty videos all day. He even masturbates. I couldn't expect this from a 54- year old guy. I am getting sick and tired of him day- by- day. My mom and my brother also hate him very much. The family from my father's side is really horrible. My dad's sister does not respect my dad and my grandfather (My dad's dad) shut down my mother's clinic which she had opened in our house. My father is a very rude man. I want to lodge a complaint against him for hitting my mom and me. I want him to be out of my life because he is also mentally torturing me by constantly making fun of my weight. My father is a retired army person with the rank 'Colonel'. Please tell me what to do.