Myntra.com — Regarding return of different product instead of actual product

I had purchased Byford Pentaloons loafer shoe from myntra on 12th April 2022. After using a week, inner material of shoes gets teared and i file complaint against it. On 9th may 2022 return pickup had been placed by Myntra when I was not present in the city. My elder brother given different shoe instead of Byford Pentaloons loafer shoe, and delevery agent verified it and I got the refund. On 16th may when i came to city and found that Byford Pentaloons loafer shoe still in my home and mochi shoe missing. I had contacted to Myntra customer care but not satisfied with their processes. They deny to help regarding this.