Myntra.com — Not returning my product

Website:

www.myntra.com

I recently bought a product from myntra which was of small size so i created a return request. The delivery boy came and said serial number was not matching and refused to return it. I called customer care and they assured me that complaint is registered but again the delivery boy refused it. This process is never ending and it's been 4 times this has happened. I am tired now complaining such bad experience. These people are not tagging and packing properly and asking for some stupid information which is not available.

Please help me get my money back. This is my last attempt to buy. Will never take their service again.