Punjab National Bank [PNB] — delay in receiving the refund from the bank

Address:

FLAT NO 302 BLOCK B, RASHMI VIHAR APARTMENT OLD POST OFFICE LANE LAXMISAGAR, Khordha, Odisha, 751006

I purchased an us polo tshirt from amazon on 03.03.19 and done full payment by debit card but order was cancelled on same day 03.03.19 and now amazon is saying that refund has been sent to your bank so contact customer service and file charge dispute. They had given to me transaction id 74332749063906277479364 but customer service is saying that they can file nothing file charge dispute and can only check if money came to your account or not. Same behavior by branch also.
Now don't know what to do.