Punjab National Bank [PNB] — Refund not received

There is an issue going on with my account I am supposed to get two refunds, one from Amazon(Expected date-03/02/2021) and one from flipkart (Expected date- 09/02/2021) but I haven't got any of these till now.Both these e-commerce websites have provided me a reference id, which can help me locate my refund.I reached PNB customer care support but they are not even listening to my problem I told them that I have reference id for both of the refunds I want to know when will I suppose to get my refund back as it's already too late.But they told me that they cant help me in that aspect.So I urge you to resolve my issue.I am attaching both the refund reference id as well as screenshot of amazon mail and flipkart.

Refund reference id (Amazon)-
30005110241024094010475
Amount- ₹258(Expected date of refund-03/02/2021)

Refund reference id (flipkart)-CR21020116243310025577803
Amount- ₹665(Expected date of refund-09/02/2021)

Please help me with your assistance and resolve my refund problem as soon as possible.