Myntra.com — complaint about not getting any update after returning my product

I applied for returning my defective roadster black jeans, but it failed the quality check process. I got message regarding that. After that i haven't received any update from myntra. I called in myntra support thrice, but they keep on postponing it and texting me that my issue has been resolved. I want my money or product back as soon as possible as it has been more than 15 days.