Punjab National Bank — refund pending

Pnb is delaying my refund of 2097 as myntra has already initiated the refund in bank but it's the bank who is sending me mails that my account is credited I am due to recieve 377 rupees in my account which pnb is denying can bank keep their customers money like that I am chasing Mt refund for last 20 days and no response from their side is seen.I am sharing the screenshot of products and their amount below with reference numbers and I have also mailed them at [protected]@pnb.co.in but they are saying account credited no amount is recieved only one transaction is recieved of 377 rupees and one is still pending which is also of 377 ru pees.