Every state has its own Rent Control Act which may have different provisions, and providing different types of protections to the tenants. Please consult some lawyer in your state / city having regard to your local state Rent Control Act which may be applicable in your case.
But, generally speaking, you may have to file a suit for eviction of the tenants from your premises since you say that they are not even paying any rent for last several years. Depending on provisions of the Act applicable to you, you may also take the ground that you need the premises for your own use or for renovation, etc., or whatever other grounds are available to you under the Act.
Dr. Ashok Dhamija is a New Delhi based Supreme Court Advocate and author of law books. Read more about him by clicking here. List of his Forum Replies. List of his other articles. List of his Quora Answers. List of his YouTube Videos.