Punjab National Bank [PNB] — refund process from online purchase

Address:

YSR, Andhra Pradesh

Hi,
On 5th june 2019, we have purchased cardio max exercise cycle in Amazon for Rs. 9999, but that transcation was cancelled on the same day . when we called amazon customer care for refund they told that amount has been refunded and provided us with transcation id 337305, but when we called bank customer services they are saying that amount is not credited and said there is nothing like charge dispute form and we cannot do anything in this issue