Air India — Rescheduling my ticket

Address:

new delhi

I have called the call centre many times to reschedule my flight, but no one is able to change it. They keep on disconnecting my call. Nobody has answers. everyone keeps on saying i have changed many times so i cannot change it now. But last time when i called and asked for changes, the agent said he cannot give me 20 july 2022 booking because of some migration issue. He asked me to call again to make changes. I have been calling since yesterday but no one is helping. I was also asked to goto ticket office in delhi. I even went there, but then they asked me to goto airport. Then I went to the airport. But again now they are saying I have to write an email or goto ticket office. Neither the ticket office nor the airport is near my house.
And to be clear, I am not here for vacation, my father is serious and hospitalized since 21 march 2022. That is the reason I made changes with my dates. And The flight scheduled on 16 june 2022 was not decided by me, your agent said to book currently on this date and later call again to make changes.