Punjab National Bank [PNB] — I am not getting my refund in my bank account

My name is Shaurya Shukla and I had a book named Digital Logic and Computer Design | First Edition | By Pearson of RS.Amount 530 in Amazon on 18 oct 2020 and after 22 october 2020 I returned this order due to personal reason. And on 23 oct 2020
Amazon initiated the amount to my card but I still didn't get the money. Amazon didn't send me any reference number and told me to fill charge dispute form but Indian Bank doesn't have such policy. I am attaching a screenshot of my refund it's showing here the money is refunded but it's now upto more than 30 days there is not any reference number not any refund So
please kindly respond to this complaint it's very urgent. My card number is [protected]
Card holder name is Shaurya Shukla
Thanks you sir