Cancelled Ticket and not Refunding the amount- JET AIRWAYS

I booked a ticket on 7th Feb protected, Flight no. 9Wprotected, PNR no- HLSCRI and it got cancelled. I got a message from from Jet-airways- "Dear Guest, we regret to inform that your flight 9WprotectedFebprotected from DEL to CCU is cancelled due to operational reasons. For assistance with refund please call the local Jet Airways office or our India Contact Centre on +protected/+protected". I have been trying to reach them through call/email but not getting any response from them. I haven't received my refund of Rs. 4,protected/- yet.