Nokia — My phone is not starting

Address:

Burdwan, West Bengal

I bought a Lumia 520 via flip kart on 2.12.13. In between it was causing trouble while phoning, net browsing etc.. It was used to go Nokia service centre often.After using for a year like this, the phone did not start one day while phoning a friend. I immediately called the Nokia Service Centre and they told me that motherboard needs replacement which costs around 7000/. Sir, the phone costs 7899.00 where as the motherboard costs 7000.00. How can the phone be stopped like this? Why the phone will not be replaced? My phone IMEI Serial no is [protected].