Bank Of Baroda — charge dispute (bank of baroda)

I ordered an item from amazon on 9th march 2019. Due to some reason, i had to return it and amazon issued a refund against it on 19th march 2019.
On contacting bank of baroda customer care, they asked me to wait for 14 days for the amount to reflect in my account.
After 15 days i contacted the customer care again to know the refund status. I provided them with the refund reference number issued by the bank (Given to me from amazon) is with me but the bank denies any such amount.