GoAir — go air not giving refund - pnr - pyi9vt

Hello,
Pnr - pyi9vt

I have been following up go air since march 2020 for the refund of the cancelled flight but they are not ready to refund my amount. I have tried calling many times. Mailed the nodal officer, appellate officer and customer care so many times, initially they did not reply for 5 months, then they said they can only reschedule and now they reply saying they will charge cancellation fee. Why would they charge cancellation from customers for a flight that was not cancelled by customer? Flight was cancelled by goair but still they are charging thr customers.
Please help me get my full refund. I have no travel plans so i need my full refund.