Apple India — Unsatisfactory service

Address: New Delhi, Delhi, 110089

My complaint is regarding my Iphone 5s which is still under warranty and the customer support is not willing to accept it. The phone is getting heated up in a very short use and on charging which might result into an accident. I tried to bring this to the kind notice of the service executives but they were very rude to me. I will also attach some photographs which will show the condition of the phone. If apple will also provide this kind of service support then what is the point buying an Iphone and spending so much. Customer support is the backbone of a good firm and somehow apple is not looking after it as it use to do earlier.
There is a very minor scratch on the upper right edge of the phone which is hardly seen. You can make out the exact state of the phone by the photographs attached.
I will request to do the needful on the matter and help me on the issue.