Myntra fashion - Money debited order NOT placed Myntra not refunding

On *th March I placed an order for *mount **** INR at Myntra fashion, unfortunately the transaction was pending for * days. On **th March the transaction was shown as successful but there was NO order placed at all. I buy these stuffs using Amazon UPI, talk to Amazon and my bank accordingly but they confirmed that as the transaction was successful so Myntra can help on that. In my bank statement it is recored the money has been deducted. Since last couple of days I am contacting to Myntra, and on **rd March they mentioned that they received the amount and will refund within *-* working days. But till yesterday here was no refund of the money, they I contact to then and they told with **th April I shall get the refund, but today I got a mail from Myntra and they completely ignore about the transaction. Need help to get the refund.