Information about property

Hello, my name is Suvendra Gupta, I am 25 year old, and reside in New Delhi, Five year back after my fathers death me and mother shifted Delhi, and since that time my Uncle (Tau JI) taking care of all the property we have, in that property we have three owner, one of my elder uncles (Tau JI) son, second is my younger uncle (Tau JI) and third me and my mother, according to the family as we use to talk there should be three part of that property, and each of us will take one piece, any which we think is good for us, but there is a problem started happening suddenly, my younger uncle is asking for extra property and instead of taking one piece of property, he wants use to give a extra from all the property, and he says that if we'll not give them that part he will not let anyone take his property, and somebody told us that he has a property loan on that all property, how we'll get to know how much loan he took, when he took, and he took or not. kindly help, I don't know anything about law and all, as I never thought I will have to be the part of this kind of stuff.