Punjab National Bank [PNB] — Refund Not Processed

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I made a payment on 16th July 2020 from my PNB DEBIT CARD. I had Cancel the order the order on same day. My refund has not yet processed. Amazon is saying they have processed the same & have also provided Refund Reference number 75503720199040989742667.BUT as on[protected], I have not received any refund.PNB customer care is the worst. They don't even provide complete information just disconnect the call during the conversation