Intex Mobiles — defective phone

Address:

New Delhi, Delhi

Sir, my name is pubali pathak from lajpatnagar delhi.i have purchased intex mobile phone 21-7-13.But from from feb 14 this phone is not working, and when i went to service centre in nehru place first they replace my phone from other one because they were unable to correct the problen of my phone. After one month again problem starts in my intex phone and i went to nehru service centre five times but they are not be able to repair my cell phone, so what should i do.