Jet Airways — refund not settled even after 3 month

Address:

Chennai, Tamil Nadu

My jet airways flight got cancelled by airlines a week before travel, I have been advised to complete claim form which I did immediately on March month itself. I keep following up airlines for past 3 Mo ths.. i get assurance from customer care that will get refunded soon .., once I got message that necessary details updated in your refund request, u will get soon. but now not getting any response on my follow-up ..

Kindly help on it, and why airlines holding our money.. which is not investment or deposit we made, as service cancelled by airlines it has to be settled .. kindly help

Route:CHENNAI-DELHI
Travel Date:31 Mar 2019
PNR: EABVNP
Ticket Number:[protected]