Jet Airways — No refund for cancelled flight

Address:	400060
Website:	www.jetairways.com

My Chandigarh-Del-Mumbai flight on 9-Dec-2016 was cancelled for the Chandigarh-Delhi sector by Jet airways due to bad weather.
I had even done web check-in and got the boarding pass of the flight when it was cancelled by the airline.

PNR: HSZOYL
Cancelled Flight: 9W 2648

For that I was informed bu Jet airways service desk on call that full refund will be given for whole journey.
Now it has been 12 days and after more than 3 reminders by email to [protected]@jetairways.com there has been no action and no refund.
Please help in getting the refund.