Punjab National Bank [PNB] — Amazon refund

Address:

932 ashok Nagar

I purchased moto tender care coccyx, tailbone ₹734 and birbira universal back lumbar support chaired from amazon on 23.12.2020 and done full payment by debit card but order was cancelled on 23. 12.2020and now amazon is saying that refund has been send to bank. So contact CUSTOMER service and they said they don't file any charge dispute they can file nothing like charge dispute and can only check if money came to your account or not. My Refund reference#3000510358035807540192
But CUSTOMER service is behaving very bad they even cut my call. Pnb CUSTOMER care was not hepfull they were like they don't give ### about our issue.
Same behaviour by branch.
Please help me to get my money back.