Myntra.com — No refund amount credited

On 28/06/2022 I, Rachna Jhaveri, used my debit card on Myntra app for a total amt Rs.6482/-, out of which i was expecting a refund for 2+3 return items.

I have received credit on 3/07/2022 for 2 transactions, the other 3 are pending amount 743, 799 and 896.

Myntra confirmed that they have already initiated the refund for the three transactions but it's NOT YET CREDITED in my account NOR have I received any valid IMPS reference number for it. Also 3rd July refund was done through UPI immediate credit, why not the same procedure used for these three transactions?