Consumer Redressal

Dear Sir/Ma\'am, I Purchased A21 Karbonn mobile worth Rs 8500 IMEI no 911240900839259 on 08/03/13. From the second month, I started facing battery drain and hand issue in my mobile. So, I submitted handset to K N Technology Service Center Bhandup(W). They formatted my phone and changed the battery and told me that I will not face any problem in future. After some days, I again started facing the same issue. So I submitted phone to Mobile Care Service Center, Thane. They again formatted phone and when I received my phone, the battery was discharged. so they said here we cannot charge battery, when you will charge the battery, everything will work fine. I was not able to even turn on my phone after nightfull of charging. So Next day I went to Global Telecom Service Center Bhandup(W) and told him the story. They sent phone to Karbonn Head office for 2 months. After 2 months I received my handset with same problem. Sir/Ma\'am, Please help me in this regard. I will be very grateful to you.