Consumer Redressal

I had purchased Pureit Compact 1250 gr on 21/06/2014 and day before yesterday I had lodge complain with your customer care and your representative had visited my place and ask to change battery and for which he had charged Rs.400/ First of all I do not understand how Battery is to be replace within 3 months and if it is defective than why should I bare the cost within warranty period, secondly he had not fixed the devices properly so there is leakage of water from bottom Kindly send your representative Immediately to rectify his mistake and refund me charges which was wrongly charged to me I had replaced Germkill kit earlier also within lapse of 3 months from date of my purchase now again even period of 1 & half month is not passed after i had replace germkillkit my pureit not working and giving same problem so let me know thelife of pure it which i had purchased and germkill kit which you had originally installed and also which replaced on 14/10/2014. I want proper and satisfact