Go Air — Ticket refund and solution

I booked a Go air ticket last year dated 24th April'20 during pre covid situation of course. Unfortunately it was cancelled by the airline due to lockdown. However they didn't refund any amount which is 7715/-unlike INDIGO airlines and asked me to arrange for travel later on. The requirement of my travel was on those and not now due to a medical situation. Now the expiry date of those tickets are 03'May'21.
Its very unprofessional and disappointing for the airlines to not refund the amount.
Kindly look into the matter and arrange for a refund as soon as possible.