Punjab National Bank — refund not credit my account

Address:

Haridwar, Uttarakhand, 247667

Sir I have buy a product from Amazon using UPI payment and I have cancel order myself but refund not received, after 6-7 I call Amazon customer care he told me the refund is send your Bank with reference number#[protected] but bank told refund is not recieved this reference number so I can't receive my refund please solve my problem. I think Amazon is fraud so please refund my money.