Samsung — Defective Samsung Galaxy Note 3 sold to me and company refusing to replace

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New Delhi, Delhi

I purchased Samsung Galaxy Note 3 on[protected]. After using I noticed that it gets heat up even during normal use like browsing the pictures gallery. It gets over heat up during battery charging. And the battery lasts only for 2-3 hours after a full charge. On[protected] I went to 'The Samsung Plaza' from where I had bought this phone. They advised me to clear RAM after every use which I was already doing. They told me to do it for one more day, but it was of no use. I was facing the same problem. On[protected] I called them and then they told me to visit the Samsung Service Centre. On[protected] I visited the Samsung Service Centre where they reinstalled the Operating System, but even that didn't solve the problem. The company gave me a phone with a hardware defect. I invested my Rs. 48, 000 in a phone and I got a phone that is defective. Now Samsung is refusing to replace the phone. Please tell me what shall I do?