[Resolved]  Punjab National Bank [PNB] — Refund initiated by Amazon but money not credited in my bank account of PNB( As OBC is owned by PNB now)

On 10th of February, 2021, I made a transaction with Amazon of Rs 1906.25 for ordering a Gas Oven But returned it due to fault in it and opt for refund and Amazon has initiated the return and refund on dated 21 Feb 2021 but it has been over the 5 days I yet to receive the refund in my PNB account.
Whereas in the app of Amazon it is saying that payment transferred to original payment method. Customer service of Amazon is saying that we have refunded and generated RRN no., it's your bank problem and customer service of PNB is saying amount not credited and we cannot check through RRN no. Please do the needful and resolve my problem . This is a miserable condition I am facing.
The twist here is the Total payment I hade made to Amazon for the product is Rs 2290( Rs 384 from Amazon Pay Balance and balance Rs 1906 from Debit Card) . Amazon has refunded the Amazon pay balance on the date of return 21st Feb 2021 immediately but money to my bank account is yet to receive. So Amazon is repeatedly saying that we have refunded all the amount that's why you have received the rest Amazon pay balance. You have to contact your bank for the rest 1906 amount. Attached screenshot for your reference and necessary action.