My uncles are troubling my family with property issues

Hello, this is pooja from kachiguda, Hyderabad. My grandfather's part of property was divided amongst his three sons(including my father, my father is the second son) few years ago. We had many disputes while the division was held.(division occured this way: Ground floor was divided to three of them and each of 1st, 2nd, 3rd floor to each son). The part belonging to my father is registered in his name. Another part of land is registered in the name of all three brothers and the actual property papers are with the youngest son. My father has three daughters(which obviously includes me). My uncle always had eye on our property and has always troubled us even after the property partition. He used to discard our electricity bills and tried wrest our land from us in the past. He not letting us and other uncle’s family to use the water supply which was decided to be used by all three families. My doubt is whether he can transfer the property to his name without our consent or involvement ? I could only verify the status in property tax site(GHMC site) I want to verify the status of registration of our existing land, but i don't know the process of it. It would be very helpful if you could brief me the process. Another concern is we dint receive this month's electricity bill, later got to know that someone has paid our bill. I doubt this might be done by my uncle just to trouble us. Can this electricity bill be of any use to my uncle? Should we lodge a complaint about this? If he alone was not enough, another uncle of mine(my father's cousin) has also started troubling us. His son (aged 25 years) has done a small ritual in the marriage ceremony of my two elder sisters. For this thing alone he started believing that his son has rights on our property. He even threatened my mother to legally adopt their son in fit of anger else he would take legal action against us. Can he use my father’s thumb prints or signature to generate adoption papers? My mother had a slightly bitter argument with him upon this. My doubt in this case is can he arrange adoption papers by himself without my parents consent? Can he be any threat to us? Can i relate the electricity bill issue with him? Please help me understand the legal aspect of these issues? My mother is having hard time because of these doubts. I want to clear the air once and for all What measures should i take to be on the safer side from both my uncles? Please suggest any documents or sites which can help me resolving and understanding these issues. Thank you