GoAir — Flight cancelled without intimation, customer care service not attending refund enquiry

I had booked a flight G8 791 from Hyd- Chd on Dec 8, 2020 for my mother, PNR - GC4R2K, while trying to do web checking today, I came to know this flight has been cancelled.

There was no intimation at all, not at all attending to refund enquiry, need confirmation for full refund immediately else I am going to lodge a complaint and work to create awareness never to travel with such pathetic airlines