My house in my village has been rented to govt office for a long time, almost 36 years. Rental agreement is renewed every 3 years. The house is old, no major maintenance has been performed till now. There are many issues that need to be addressed. When asked if they would vacate, they keep replying they will move once they get another suitable place. When I point out the maintenance issue, they say to do patch works while they are in the property. Patch work is not a solution, the building can be a danger to the tenants. I want to tear down most of the walls and rebuild. How can I get then to vacate?