Parents and Senior Citizen Act

I am aged 86, and my wife aged 80 residing at our hometown of Kariyamanickam village in Tiruchirapalli Dist of Tamil Nadu State. My Elder son who is higher official of Maharashtra State, residing in My flat, which brought in my own earned and capital gain. I wrote a will on 2015 both of my two sons Elder and younger. After getting the will, my elder son cut off his relationship with us, and totally forgotten us. For the past 3 years he did not contact us, even the pandemic situation, there is no courtesy inquiry from him at least. Our younger son only supporting us Physically and Mentally. We have no need of financial support ever. I disappoint about my elder sons attitude, and i canceled the will, which registered earlier. I also had given an Advocate Notice at the end of Dec 2020. He replied through advocate, and not ready to vacate and handover my flat to me. In this Pandemic Situation and due to my age, i can't go Maharashtra now. I would like to vacate him immediately. What can i do?