Agriculture land dispute.

My father deal a agriculture land in the year 1994. Suddenly he demise before registry of said land measure 180 heactare. 4.5 acre. Land situated in chhattisgarh my home village. We brother were minor 9 & 15 years of age. Mother is illiterate. My maternal uncle done registry in four parts but hide the fact from most of our relative as my grandfather all family were living in same village and having good relation always, then, now. They are witness till now. Registry done in four parts in 1996 in same day with same witness. Witness and property owner who sell the property died now. 1. 5 acre (60 hectare) my elder brother and my name each with joint name my widow mother Rest 60 hectare in two parts self maternal uncle 20 hectare 40 hectare with his minor son name. But registry done with single name no joint name like us. He firstly agree when my father alive to keep 20 hectare land (1/2 acre). But seeing my father's bank balance he mischief us and done registry in the pretext to save registry tax. And later it was return as two parts registry. This was known as witness by my elder sister and brother-in-law who was adult and married But he did not return the land he mischief used our money to registry of said land of his name also