GoAir — refund request

I am pramod ep and i had booked a ticket in go air flight g8-657 from cok-blr on dec 20th. Now i received an intimation that flight is cancelled. They are requesting to call the helpline for refund/rebooking. Firstly i lost an additional 1500 due to this cancellation. Now i am unable to reach them by any means caaling customer care/ sending emails to refund email id. Kindly let me know what is the way to get the refund.

Thanks,
Pramod