[Resolved]  Reliance Digital — sony 28 led 28r412b purchased on 16.10.2016 at reliance digital - phoenix mall velachery

Address:

Chennai, Tamil Nadu, 600042

I purchased a sony 28 led 28r412b on 16.10.2016, it is just one year completed and i saw one white back light in the display screen on 08.11.2017 (Photo with date stamp attached).
When i complained this to reliance digital they sent a sony representative to my house for checking. The person who came to house opened the tv to take photos of stickers and serial number. When fixed the tv back there were several back lights seen in the screen and the display became worse. (You can see that he is taking the tv photo with date stamp attached).
He promised that this problem will resolved free of cost as he know that he made the repair even worse. But i have received a mail from reliance digital asking for rs.7500 for repair.
Is this fair? The product has not survived even a year. Do they sell use and through products, if so why should we pay so much? Can't they extend the warranty for at least another 1 month and do it free? How will i pay for the mistake done by the service person who opened the television and made it more worse?