Hi we have a property in Bangalore purchased before 40 years- A katha

WE have a property in Bangalore south within city location of 3000 sq. ft, for which even we got the 'A' Katha and paid taxes till today. While Purchasing the property, it was a revenue land and for that the road was planned opposite to our plot. Just next to the road, opposite to our plot, the land lords were having their lands. in 2003 they allege occupied the road and constructed their houses in the road saying, we are non Karnataka people, and no one to support us, though we went to police station, we didnt receive much support and my father is not so educated for going Via court. but he made a agreement with another neighbor (a notary), next to our property for giving 10 feet of land as road to us. Now the problem is, the land, apart from occupying the road now they are saying they have another 10ft of land towards our property and the land we had made a agreement with neighbor. Also already encroached 1 feet of road area, which is making us trouble even to get a car inside our property and its just rowdyism and light political influence. Though we have the Katha 'A' for our property for entire 3000 sq.ft and paid tax till today, we didn't receive any help from BBMP. Those people forcibly destroyed the portion of our compound wall 10 years ago, which was built for our security purpose and on that time itself, they also gave the sanitary connection and water connection from out property. so that their idea in future to occupy or make it as common property. Now I want to take over the property how to clear the mess. need all your suggestion