Flipkart — Done with your System Upgradation ?

Address:

Kolkata, West Bengal

On 30th April I ordered a mobile Karbonn Smart A27+ (Black) (OD[protected]) from Flipkart.com website. The order delivered to me on 3rd May, after using it for 17 days, I found some problems with the set. So on 21st May I requested for return (ID: 5131535 ). Till now nobody even call me from your end although its mentioned "We will contact you within 24 hrs to clarify your request." I called up customer care[protected] on 22nd but they failed to give me any information and the reason they told me is " System Upgradation".