Jet Airways — jet airways cancelled flight. refund not received over a month

I have booked chandigarh to kolkata flight on jet airways via paytm. Jet has cancelled the flight but no refund has been received yet. Everytime i ask paytm they say they will refund later. The tickets cost me rs. 7554. Jet and paytm should refund my full amount. Because of this cancellation i had to buy other ticket at higher price, let alone the anxiety and harrasment.