Punjab National Bank [PNB] — Refund didn't credited

Order #[protected]

I purchased a order from Amazon on 27th december 2020 and cancelled the order next day that is 28th december 2020 .After cancellation Amazon sent me a message that refund succesful.On amazon app it was showing that expected date for credit of the amount is 2nd january 2021 but it is already 3rd january. Amazon provide me refund reference number and told me to contact with bank customer care but they didn't help me. The refund reference number is 74332740364036306324343 please help me. The refundable amount is rs 3650. Please help me to get the amount.