Uncle's excluded father from grandfather's property, how to claim?

My grandfather (GF) died in the year 2009, left with 5 sons and 4 daughters. He left with properties in his name and my grandmother (GM)’s name. My father was the eldest son of my GF. My GF suggested to my father to stay separately in another house due to family issues. We have not separated with anything legally, my father stayed in another house from the year 1995. In the Year 1997, my uncles (Father’s brothers) created a WILL mentioning that all my GF properties will go to only four sons excluding my father. That WILL is registered. My GF looking to our family conditions gave my father a non-registered WILL (plain paper) in the year 2008 and in that he mentioned that all his properties will go to my Father only. In the year 2011,my father passed away and now my uncles based on their WILL selling the properties and giving my GF properties to my father’s sisters. They also created a GM’s WILL in 2016 and mentioned that all the GM’s property will be taken by her 4 sons. Can we claim?