Punjab National Bank [PNB] — Amazon refund not credited in bank account

Amazon refunded amount Rs 34999 on 2 oct 2021 but it not reflected on my account till date. When i ask to amazon customer care they told visit you nearest bank with Refund Ref. number . I did same, when I visited to bank PNB manager told they cannot track my refund status with Amazon reference number and you need to talk with your refund team. Again i called amazon customer care . Amazon people again told same things like Reference number is already generated on amazon side so we cant help you, you need to visit bank.
Once again I visited to bank this time also I got same answer that PNB cannot help you on this.
Even I did online complaint on PNB website also but i did not get any update there also