Property issue related to family . property consists of 50 sq yds

My grandfather died without naming anyone in the 50sq yd property in delhi. The property is still in my grandfathers name. Currently my father and his two brothers live in the property at each floor along with their families. my father lives at second floor . first floor is storeroom and my father's elder brothers live at 3rd and 4th floor.my father's brothers are very bad people every time they disturb us by one reason or the other and behave badly with us. My father told them that to sell the property and divide the amount into equal parts but they refused and said they won't sell and wants us also to live like them. My father has 2 sons and 1 daughter including me and my mother. It is very problematic to live and also how we will live after the marriage of my brother and myself in 50sq yd space. Please help what to do now as they completely refuse to buldge from their decision.