How to recover Money

Hello sir. My name is Sam from Bangalore. We belong to low level budget Family. My Dad passed away on 2007, while I was at 8th Standard. Since then it was very difficult to survive to pay rent and for food, school fees, and soo. My mom's income was insufficient to feed us. She has borrowed some amount from our relatives and from others and lended to few people for Interest. Initially for couple of months they paid interest for less than 6 months and now they are not returning our Principle amount. While we requested to return the money back so that we can repay to the one whom we took. Since it's been more than 2-3 years they have not paid single pie. While we ask them for the money, giving random answers and threatening on us, since my mom and me has no support anywhere. My life has become very difficult with this situation. We did not sign any legal papers to our lenders but we have taken a cheque and got signed to a affidavit paper 3 years back for a lesser amount. Please help.me.how do I get solved with this issue.