Major family issues.?

I don't know where to start really. My family is completely split up into all these different groups. Theres my nan's group, my granddads group, my mums group, my dads group and my dads family group. My nan doesn't want me seeing my granddad and neither do the people in her group. My granddads group are so wrapped up in themselves that they hardly see me, my mums group, it's just her on her own really I live with her, my dad who doesn't see me and my dads family's group who im trying to get back in contact with but they all argue big style and once or twice the police had to be called because of all the physical fighting as well. I'm only 15 and I get accused of betraying my family members by talking to other groups. My dad and his family are criminals and all of them have been in trouble with the police and have been in prison. The other groups are really upperclass and they go on at me for anything. They even are nasty by the way I talk (my accent), there is a big thing happening in my life soon and I want my family there but they argue what should I do it's getting me down. NO TROLLS PLEASE.