Zopnow.com — Failed to deliver the correct product and denying my return request

Address:	Bangalore, Karnataka, 560041
Website:	www.zopnow.com

On 25/09/2015, I ordered a product with ID# 3847884‏ but the product wasn't exactly what i ordered and i requested for return on 28/09/2015 as they had return policy within 15 days of delivery. But till now they didn't pick my return items and giving some lame reasons and not replying to my mails. The product cost is Rs.600. Please help me out. Thank you.