Legal action against in- laws for mental abuse & child's custody

i am being mentally torched by my in laws / husband since last 10 years. conditions become more worst now, i have m girl child age 9 yrs. but they do not agree to send her with me anywhere even in my parents home. they also misbehave with her a lot of times in front of my eye. washed her brain in absence of me as i m working women. i want to get rid of them and also want my child get rid of them bcoz they would be harmful for her future. my brother in law a drunk man. my girl is not safe. pls guide me i m at my parents home but my child is with them right now they r not sending my child with me. one more thing i want to give u that my father in law is a property dealer and make sale / purchase of land in my name since marriage and make profit. one of the land court case is pending in court in my name bcoz they make some fraud with purchaser and they file a case against my name. they use my only to sign the papers for make profit on land for them. i am from a Brahman hindu family