Snapdeal.com — no refund given though wrong item delivered by snapdeal

hi, i bought a kurta for my wife from snapdeal.order no [protected].snapdeal delivered it at my place on 11th april 2015 but it was a wrong item they delivered. on the same day i registered my replacement request to snapdeal via ticket id 18409595.i also returned the product to their kolkata warehouse and it was delivered to them on 16th april via professional courier.i have mailed them the scanned copy of courier receipt also.but till date i have not received the replacement or refund of money.everytime i raise a complaint to snapdeal i get automated messages that my complint is being looked after by them.sometimes even i get mails from snapdeal that i have chosen not to return the product and thus no refund.this is a total mess and casual approach by snapdeal.i have shopped from amazon, flipkart and many more site but never faced such problems.