How do I get my father to listen to me?

My mum is A very manipulative woman, she can twist things in ways which benefit her best. And one person who she loves to manipulate is my dad. We keep having arguments over the most trivial things. And she has said for years that she is going to split with me dad, but she never does, and to be honest I'm quite sick of her going on and on about it. I just ignore it, the thing is she hates it when I does, because she wants the reaction. I come out with "mum you're being melodramatic" and I get yelled at screamed at, slapped, threatened and punched. Then my mum loves to tell my da her side of the story, where I have been the evil child etc and that I have done this that and the other (complete lies), then I get abuse from my dad. how dare you do that? Blah blah blah, disappointed in you. But he won't let me explain what happened! No he believes her. Sometimes i just think he does it because he is scared, but I'm sick of the Same types of things happening, barely any of them which are my fault, and i get blamed, and not allowed to explain myself. I'm sick of being the kid who does nothing bad and yet gets treated like crap. She's even got some of my aunts, uncles and cousins to go against me. Some believe me, but they don't do anything. So how can I get my own dad to listen to me, and how do I stop that manipulative cow, after hundreds of failed times to talk to her and negotiate with her? Thanks.