Vacating a rented property

We have been living at this house for over 40 years, there are multiple owners of this property who later on stopped taking rent from us. We did pay property tax for some years, but then when they got to know that, they started paying the tax themselves. They have not done any kind of maintainance of the property and we have had to do it all at our cost. Now from some years every few months different people come to check the property claiming that it is theirs. We are not sure if they have the property papers or not but they surely don't have rent agreement that was done years ago, we do have it with us though. They want us to vacate now. If we don't they are going to file a case on us.They don't even know details of the house like house number or address. What is the best thing for us to do in this situation? Can we ask them for money in exchange of vacating? Ours is a house as big as a 3 bhk flat in a prime loacation in the city. The rate of a 3 bhk flat adjacent to our house is 50L-75L. Please advice what is the best thing to do?