Neighbor's have increased the boundary wall and captured our land

a week ago my grandfather's house was trespassed when my neighbour broke into my grandfather's house wall by extending their boundry wall. i lodged an FIR for the same. and have taken stay order for 8 days. what can i do to reclaim my property. its a very old house, my grandfather has passed away some 15 years back. It was passed to my father as his share of inheritance. we has electricity bills of this house in my grandfather's name, and many other documents of our property. how can i reclaim what's mine without having to wait for years? i need help. i and my neighbour are muslim.