Sony India — Decision pending (repair or replace)of my new handset M5 model no E5663

Address:	Amravati, Maharashtra, 444607
Website:	www.sonyindia.co.in

I am purchasing sony M5 (MODEL E5663) on dated March 2016 within few days mobile starts problems( automatically switch off ) that problem related with motherboard i have gone to sony service center in Amravati they told me mobile has software problem we resolved it. After a week once again handset start same problem then i try to change sim card on that period my phone was physically damaged and problem is one sim card fail to show network but other support with this complaint on Sep 2016 and its under warranty period, i have gone to sony service center at Amravati (job no. W[protected] and they told me that this phone is not in under warranty only repairable but after few dayes some one call from sony service center and tell me due to unavailable parts of this hand set we try to replacement of handset, for this replacement i want to pay10000/- EXTRA cash payment on sony service center irrespective of attending my complaint.
how this can be possible for a company who is selling a mobile phone worth rupees approx 27000/- and its unrepairable