Domestic Violence

I'm facing domestic abuse(physical violence) at home by my brother and emotional and mental torture by my parents.I'm 21+. I'm not able to move out of the house as well.I've been asking them to at least get me married if they aren't able to bear me,but they aren't ready for that either.I'm completely stuck.It's becoming complicated every single day.My parents are character shaming while I have proofs that I am not a bad person.I have already tried to commit suicide and I keep slitting my hand and they never cared.When I had my friends talk to known local police,they said they wouldn't wanna interfere because it's a family affair and it's obvious that since they are parents,they will be given preference and whatever they say would he considered as the truth and I would rather be at problem for even raising a complaint.Regarding my brother,I have already tried calling the police but my parents stopped them saying no one will be able to even touch their son when they are alive.My brother even beats my mother and it has occurred on several occasions that we had to call the neighbours to even control him.I got beaten up a lot of times by him as well and my parents always shh me and stop me from taking legal actions and do nothing about it.No one is able to understand the intensity of my problem and of what kind of mental situation I'm in.I don't know who to contact.Need an advice.