Myntra.com — tommy hilfiger sunglasses refund.

I shopped for two tommy Hilfiger sunglasses from Myntra but one was way too big for my face so i returned the one for which order was placed on 24th June with order no:[protected]-1938203 of Rs 4220 From Hindalco colony Renukoot, Sonebhadra.
My product's return number is[protected] for which a message came from myntra that "Quality Check Failed". When i contacted the customer Care Executive Ms Ashima she told me that the product was been used. For this my reply is that how can I use a Sunglass with its tag on...
I told her that the pick up guy could have also used it for which many lame reasons were given by her like:
1) He does not have the authority to use.
2) Product was in a closed box.
3) they dont do that.
4) Never such complaint came against him.
So now the customer centric company executive was telling me that no the other guy cannot use it and its has just been used by me and btw the closed box told by her for the box just meant a box which can be closed and opened by pushing so weird reason again.
Well i am related to myntra since many years and no such complaint complaint came against me also so howon what criteria tha judgement has been done?
Hence I just empathetically deny such things and want my refund to be initiated and completed soon.
Or else by these kind of behaviour of the company one more such valuable customer will be no longer associate with the company.
Kindly refund the amount of Rs 4220 soon.