HTC India — frequently phone got switched off

Website:

Www.htc.com

I have purchased my htc 830 model phone before one year and the battery complaint started six months after purchase. Unfortunatly phone frequently get switched off so i sent my phone to service centre and it takes 15 days to get it repaired. They claim to me that they repalced my battery with new one. But the fact is problem started within 3 days of this replacement. Now my warrenty expired and complaint still exist. I am really disappointed. I feel like i dumped my money to a electronic waste!