Punjab National Bank [PNB] — Refund initiated amazon but not received.

I was booked the item from Amazon, the Amazon said that our bank sent your amount to your bank but in my bank, that amount didn't appear.
this's my refund reference '30005103080308114580727' please check do something. my item was received on 19/11/2020. they have a law (4, 5 working international bank sent your amount on your accurate bank.