GoAir — no refund received after ticket cancellation

Address:

Mumbai City, Maharashtra

No refund received after cancellation of my Mumbai to Leh flight (PNR 5UGUE3).
Called customer services twice but only fake assurance and nothing.
Have also sent emails and escalated the issue with their nodal officer at [protected]@goair.in, received no response.

They can keep the refund amount if they want, but at least tell me that so that i wont waste my time.