Punjab National Bank [PNB] — online purchase refund not reflect in my account.

Address:

Jhajjar, Haryana, 124108

I purchase a boat rockerz 430 from amazon.in but i cancelled the order on 5th march 2018. Nd a refund is created by amazon of rs.2049 but it is not reflect in my acc. By pnb. I call customer service both amazon nd pnb but not agree both of them. Then amazon give me a reference no.[protected] nd say refund is successful from our end. They suggest me to file the charge dispute form but bank say me that is not any process to charge dispute. I forced them but not agree to chagre dispute. Plz solve my problem last nd final you are my hope.