GoAir — Refund of cancelled flight

I have booked flights from hyd-maa and maa-hyd respectively.

PNR T8JWFZ on GoAir flight G8-504 from Chennai (MAA) to Hyderabad (HYD) on[protected] at 14:40 hrs is CANCELLED

PNR Q7D5YP on GoAir flight G8-508 from Hyderabad (HYD) to Chennai (MAA) on[protected] at 12:45 hrs is CANCELLED

I have tried calling many times and mailed their staff but until now no response.

I kindly request you please help me for full ticket amount refund.