Indigo Airlines — Refund not received, cust care never responding !!

Address: New Delhi, Delhi, 110025

This is regarding the cancellation of Flight No. 6E 283 from Delhi to Kolkata which was scheduled on 4th Dec'16 at 16:45.
I had booked a round trip and the PNR number is XFM22K. As the flight from Delhi to Kolkata was cancelled by the airline at the last minute, I had to book another flight!
The least I had expected was a timely refund! However to my sheer dismay, not only have I yet not received the refund, the customer care refuses to entertain any calls! Amazed at the callous attitude of this airline I can only request for a refund ASAP as it has already been more than 10 days.
PS: With this ridiculous customer service, doomsday ain't far indigo !
Apoorba Mitra
[protected]
apurva.[protected]@gmail.com