Consumer Redressal

I had purchased my phone, Nokia Lumia 720, 6 months back. Since then, it has been repaired 4 times. Within a month of purchase, my cell phone stopped getting charged. There was a fault in the charging slot, which I got repaired. Within another 2 months, there was a problem in the side volume minus key. It had stopped working complete, which i got repaired, that too after visiting twice for the same fault. Now there\'s a problem in the camera key. It doesn\'t work at all. There\'s a manufacturing defect in this particular handset. I\'m fed up. How many times more do I have to waste my time visiting the service centre inspite of paying so much money? This is the 4th time i\'ve visited the service center for repairing the same handset. I have already filed a complaint 2-3 months back through nokia feedback, to which there has been no response. My cell phone should be replaced immediately.