Flipkart — Replacement of asus zenfone max

Address:	625017
Website:	flipkart.com

I got Asus Zenfone Max in Flipkart.OD[protected] on 22.9.16.The feature is battery of 5000mAh to last for over three days as mentioned but my mobile had backup only less than five hours.i called customer care of flipkart but they said to contact Asus service centre. I went to Asus service centre in Madurai, Tamilnadu and they assured it is device defect and asked me to apply for replacement which is allowed within ten days in flipkart.I applied for replacement along with Asus service form on 1.10.16 to [protected]@flikart.com. I got a cal they will cal and solve the issue only once but after that i got several message and email that they tried to reach me but could not and the issue will be solved but till now i didn't get any solution.i want replacement for my mobile which i haven't used even for a day. pls help