I am from Kolkata . I let out my ground floor to my tenant for three years. At the end of the agreement the tenant gave me a surrender letter (in typing duly signed by the tenant and also witnessed by 2 person from my side) that he is vacating the property . But after due date he has not vacated my property and he is still occupying my property for over 9 months and now trying to deposit rent in Rent Control. I have also returned all security deposits and advance given by him before the end of the agreemnent and it was also signed by him. How can I vacate my property ?