HDFC Bank — Refund not received

Hi,

I have ordered few items from myntra and did the payment through hdfc payzapp app. But due to certain reasons myntra canceled the order and refunded the amount. Payzapp team informed me that refund have been credited to my payzapp wallet. But i haven't received any refund.
Scenario. There were 3 refunds to be done. Amount was 769, 569 and 1699. Ai have received one refund that is 769. Rest 2 amounts hasn't come. Payzapp team via email have been telling me refund has been credited in wallet. But i don't see any refunds in my transaction history nor in my wallet. They have been harrasing me since many days. And there is no resolution over call because representatives say we don't have access to anything over call, please drop email. During covid these banks are doing fraud with people. I need help.