Punjab National Bank [PNB] — Refund not received

Have ordered shoe from Amazon but didn't like the product so I requested for refund.. As I have done payment from PNB bank debit card my refund will come to orginal payment method .. AMAZON has initiated the refund on 15 and shown refunded on 20 and they provide me reference number also .. Punjab National Bank till now didn't credited this amount
The amount of show is 3399
With reference number 75105171320001240610689
Register mobile number ending with 3935
Order I'd (protected)
Account Number ( protected)