Sony India — want a replacement for a dead sony z ultra

Address:

Udaipur, Rajasthan

i brought brand new sony xperia z ultra from flipkart.com on 26/12/2014. In starting 1 month the phone was working good after that the phone start heating up and hanging too much, and after 4 months to purchase of phone, now the phone has become dead one day without any reason i was really nsane at the time. Make online complain to the sony they told me to see near by service center so i did and the sony authorised person denied from service and replacinng the set giving me unreal reasons that you made the phone dead and abused me though i simply requested him to repair or else replace the handset with the new one . For repair he denied and for replacement with new handset he asked me for RS 12, 000 / . I asked him to do it in warranty he denied for the same i am very much affected with the matter of concern though affecting financially, mentally and physical work is also tempering . Please help me out