Myntra.com — no refund due to some quality issue

Order no.[protected]-0082403
I had ordered a here n now red kurta. Returned it because of size it. The delivery guy picked it up. The next day i get an email that the product has failed quality check. So i tried calling the customer care. After almost 3 hrs, i could connect. They said the kurta has got some black spots. Which was already there when they had delivered the product.
What kind of quality check are they doing?.
Kindly look into the matter. I want my refund as soon as possible.