Need legal help

I am a 22 year old guy, living with my parents. When I was in 8th class, I gt epileptic fit, but due to improper treatment , my conditions gt worse and due to that I gt some psychological problemsand gt into depression bcoz of my parents behaviour towards me. But now my epilepsy is fine(I am totally fit fr last 3 years) but because of all that my parents have made me suffer a lot.they want a puppet everytime. Actually I want to leave home and finish all contacts wid myparents(except my sister) and want to stand on my own, but whwn ever I tried to they said you are mad, how can a child leave his parents. Recently,(as I really hate them), they thought that there is some jealous family members who hv done black magic on me and they forcibly tried to take me to the voodoo man with the help of 3 other persons and they even tried to use some syringes and medicine to make me unconscious and proved me in front of every one that I am mad. Even if I wll leave them without telling them they will track me down and prove that I am mad. And also I dont have any support of friends or anyone, I will be totally helpless.( all my madness is that I hate them and their family and even dont touch the things they have touched or if I mistakenly touched them , I washed my hands with dettol)…I just badly hate them…well I am a man of very high I.q, a really well nature boy with no bad habits and a really gud sports person, but my condition is gettin worse day by day by livin wid them, please need help badly . Is there any way to make a case against them with a lawyer free of cost. Please help me…I dont have any phone…so please mail me…thank you