Myntra.com — fake products in myntra

I purchased a nike shoe worth 3200 from myntra. But within 1 month the shoe got tored from upper side. For same i raised a concern. I shared all the details over the email with myntra support. Many times they ask for pictures. After 5 days but they arw saying it's not manufacture difect. But my concern is in myntra like platform there are fake products.