GoAir — No Refund Received

I had booked a direct GoAir flight from Patna to Bangalore for 14-May, but
GOAIR has changed direct flight to connecting flight. They gave the option to cancel the flight with full refund if we don't want to board. So, I cancelled the flight.

Flight PNR is TB8I3Q.

I have raised the complain number G[protected] with GoAir but haven't received any response even after multiple follow up.