My Sister and Brother-in-law torturing me and my mother.

My elder sister got married in 1999 with choice of her own. But within few months she came back to our with an intention of going back there as she doesn't want to do household work. Following her even my brother-in-law left his house and all started staying with us with an arrangement and consent of my parents that they will look for other house soon and shift. It's been 16yrs now they have still been living in our house even though me and my mom doesn't want them to. 16yrs brother-in-law did not earn a single penny rather everyday he comes home drunk and causes lot of mental torture to me and mom. After my father passed away they have been forcefully living with us and despite several attempts they don't leave. I'm the only earning person in the house from last 11yrs taking care of their expenses as well as all the bills of the house still they don't allow me to stay in the house. I still give my share of expenses for my mother. They trat my 70yr old mother as slave.. She cooks for them and does all household work for them and their children without any help from my sister. She is forced to do this even when she is sick. Now things have turned so bad that they stole my jewelry and sold them. They have put all my moms jewelry in muthoot finance and not even paying loans resulting all samans coming on my moms name. They take credits from market on moms name forcefully makes her do things and leaving mom suffering from debts. Now they are pressuring mom to leave the house or sell the house and give them their share. No body in family is supporting us in our favor now since mu brother-in-law is ill with liver disease she takes all sympathy votes and have made everyone against my mom and me by talking all non sense about us. Now I'm liable to pay 7lakhs money for the repay of loan that they have taken. And brother In law has cheated several people in market and taken about 60lakhs of loan from them.. Those people they come home and torture us to repay. We don't know what to do, how can we come out of this mess without anyones support.