Punjab National Bank [PNB] — refund related for reference number [protected]

Address:

Lucknow, Uttar Pradesh, 226005

My name is aseem kalra and my register no. Is [protected]. My order number is 111300660819776386303 in which there are 3 items.in those 3 items i have cancelled 1 item on 21 jun 2019 and the refund of rs 456 should be reflected in my account by 01 july 2019 which didn't reflect. I called myntra customer care, agent register my complaint and told me that reference no. Id not generated that's why my refund is not generated. After that i have got reference no. On 03 july 2019 which is [protected] and the message was
"we would like to inform you that your refund has been successfully processed into the source account. I request you to get in touch with your bank support team with the following reference number/s and request them to validate the refund transaction/s. The contact details of the bank support team will be printed on the flip side of the debit/credit card issued."

Still i didn't get my refund back and bank customer support is saying that this is a false reference no. And contact myntra for refund and myntra is saying that we have sent your refund

Please take immediate action in this refund and reflect my refund amount in my account as soon as possible.