PayTM - Refund not received for cancelled Indigo Flight ticket

I did not received the amount back in my Bank account by the PayTm for the flight ticket cancelled by Indigo for an amount of Ra.****/- booked via order number: **********. PayTm asked for the Bank account details in which the amount was supposed to be credited. I had already provided my Bank account details with account number, IFSC Code & account holder’s Name as required by Paytm. I had provided the information innumerable times & even called their customer care & informed about the same but till date the PayTm did not refunded the amount back to my Bank account yet.