Amazon India — Refund processed not yet credited

My order refund as detailed below from amazon to my PNB account has not been credited yet despite various followups with bank and amazon customer care. Please help
My account is in PNB west patel nagar branch Delhi.

My payment of Rs. 584 has been processed successfully on 9/9/2022 at 4:48pm as per amazon via UPI. The amount should have been reflecting in my account but not yet credited in my bank account. The order id is[protected].

The Refund Reference Number for the transaction as provided by amazon is[protected]. I haven’t received my payment yet (21st October 2022).
Please help me in locating my payment as my bank is asking for some UTR but amazon is unable to provide me with that. Please help and resolve this issue.