Punjab National Bank [PNB] — I didn't get my refund from amazon.

I ordered a phone from amazon and due to some reasons it was cancelled. I paid using my pnb debit card and refund was to be credited into it. But it's 6th day since my refund is initiated from amazon and i didn't get mt refund.
Refund refrence no is 75260829259033212272072.
I called amazon and they said that the payment may be stucked in bank but they have passed the fund. So please look into this matter and initiate my refund.