[Resolved]  Flipkart.com — wrong information given about product leaded me taking a wrong mobile, customer care not replying even after sending them several mails,

i brought Lava Iris 504Q (Grey) on {28/08/2013} from 'flipkart.com' after reading the specifications given below it. I was in need of a smartphone with longer talktime which was shown equal to 15 hours on their site ,so i brought it,; soon i found that its battery was draining very quickly,, later i checked on the official LAVA site the battery talktime given was just 5.3 hours ,.after 1 day of delivery, i requested for replacement of mobile and refund of my money so that i can bought a different mobile but they did not replied even after sending them several mails. i am really frustrated ,wat to do now?