Punjab National Bank [PNB] — Refund generated by Amazon but not showing in account

Money Refunded from Amazon but still not received in account
I had Ordered a Nike shoe from Amazon which i successfully returened on 27 Nov 2020 and since i had paid by debit card, the amount was supposed to be credited in my bank account which did not happen till date. I contacted the AMAZON team which replied me back with a reference number stating that they successfully initiated the refund process on 17th October tself and its up to the bank to credit the same in my account in time which can take 5-6 Business days but since it has been longer than that i called my bank with the reference number that my merchant gave me but they refused to help saying that this of no use to them.
My refund reference number is 74332740334033356899412