Air India — Refund not received

I had booked a flight with Air India for travel in Mar 2nd 2022, Paris to Chennai Return ticket for myself (PNR Z2V4M) and Paris to Chennai (PNR JYMN1) One-way for my family. But the ticket was never issued. After following up 2-3 days the customer service said the refund will be issued. 10 days later when I called again they said the refund is not raised. So they raise new request (Request#[protected]. From then on, I keep calling them every 2 days to hear that the refund will be processed in 2 days. Its been almost one and half month now. I'm travelling with 2 enfants (4 months old and 2 years old) and still in Paris because I dont have that money to rebook my tickets. I have been patiently waiting for the refund and had a faith that Air India will refund that. It is 102000+ INR which is quite a big amount for me. I have not expected this kind of issue while booking with Air India. I am expecting the very basic thing that is getting my own money refunded, I never thought I have to struggle to get my own money back.