Held documents

Hi, I am a 25 year old working man living independently now. I have a history of suffering from domestic violence and mental abuse from my father as well as it being inflicted on my mother that resulted in my depressed mental state. I moved out of my parent's house in 2014 to Bangalore for a job. Where I got under the influence of intoxicants for some months due to my anxiety and depression. I came back to visit my family in December of 2014. After my changed behavior my father sent me off to a rehabilitation center in Dehradun, and later I revealed that I was under the influence of intoxicants. I was released from the rehab after five and a half months. And things still were not right, I didn't want to live with my family, I lived with my aunt for some months and tried living with my family, I was given heavy medications since I had been admitted to the rehab, these medicines had suicidal tendencies as side effects apart from other effects. After some events I was sent to the rehab again after getting beat by a curtain rod and inflicting wounds on my head. My depression had drawn me to several suicide attempts and my father sent me off to the rehab for the second time. I came back and started living with my parents for a while while changing jobs. Along the course of this, they banished me from talking to my long time girlfriend as they blamed her for my condition and me getting under the influence of intoxication, but it was the depressed childhood I went through. They refused for us to be together as she is from Canada and they don't approve of her. I tried several times to convince them that I want to be with her but they never agreed. I ran away from their house after an argument and punches to my face and nosebleeds. And stayed with my friend for some time, I contacted them after a while and came back after they agreed to accommodate my relationship with her. After a few weeks it lead to another argument and my younger brother strangled me with a wire around my neck and my father poked me with a rod. I was locked up inside the house this time and got out and went to the police station demanding that I don't want to continue living in the same household. They didn't help me either. So I ran away again when I had the chance. I have been living and working away from them for some time now. I went over thrice to get my belongings back, but they refuse to give me my documents including my passport. They tell me lies ranging from that they have lost them, burned them, given them to someone or submitted them to the court, which I don't think is possible. I require my documents urgently at my workplace now, as I am looking for better opportunities and different jobs and my other client requires my passport for my access. I think I have the rights to have my documents in my possession. I don't wish to have any ties with them as I am unsafe and am willing to go any for procedure for it. Kindly help me out in this case. Your help is of the most importance to me.