Punjab National Bank [PNB] — refund not reflected

I have cancelled an order from amazon.in and the payment was made using pnb debit card. I have not got the refund yet and when i go to bank or call the customer service with the reference number given to me by amazon they say there exist nothing as a charge dispute form and says that they have not received any refund

Refund was processed on 8th of november
Reference number is 234018