I hate my dad so much....................?

I have an older sister who pisses me off ALL the time (no exaggeration). One day I got SO fed up and spat in her face. Now I really understand that it was disgusting and I shouldn't have done it. My dad found out and he came up to me and threatened to spit at me. He never did, but he slapped me on my torso. I hit him back and then we just hit each other about 6 times. Then, I slapped his face. He chased me through the house and I locked myself in the bathroom. When he turned the handle and realised it was locked, he said, "Open the door now and you won't get a bad punishment." I realised that It's stupid to stay in there, so I unlocked it and he pulled me. I struggled, but he's too strong. He pulled me all the way to my room and then lay me on my bed. He turned me over and I struggled for about a minute until he locked me in a position. He started slapping he really hard on my . I couldn't feel it after about the first 5, but after wards, it hurt like crazy. I sat in my room crying and then he came and told me to come down stairs to apologize to everyone. I did, but no one would forgive me. I really don't understand why I had to apologize to anyone apart from my sister and my dad. I then went to speak to my mum, but she's angry with me and my dad. She said I behaved terribly, which I agree with, so she ignored me. But the thing is, she carried on talking to my dad, even though I had hand marks all over my . I hate him so much and I really wish he didn't live with me or my family. He lived in a different house for a while and it was so much better then.