Consumer Redressal

I brought this mobile(HTC-Explorer A310e)-(IMEI No-359918041022617) on 2nd-Sep-2012 which includes 1 year warranty. Unfortuanately my mobile started getting switched off automatically where i took my mobile on 2nd- Nov- 2013 to HTC Service Center which is located in Basavanagudi-Bangalore. They did a software update and said it would be ok now so i took back my mobile back but again it the problem started again and again i took this mobile on 9th-Nov-2013 to the same service center and this time they told me to keep the mobile in the service center for observation on which i did so. On 15-Nov-2013 i went to re-collect my mobile for which they said that they have done the software update again in which it was not required since they had done it on the first visit only and they informed me that if the problem persists again buy a new mobile since the motherboard cost is around 7000 in which the brand new mobile cost itself is 5500 in shops. After i came home again the problem started and i am unable to use the mobile now since it is getting switched off every now and then. This is hilarious and rediculous since they are charging 7000k where the whole new mobile cost is less cost than getting it repaired and when i called to the online customer care through toll free number(1800-266-3566) even they dont know what is the cost of motherboard and in reply they say only the local HTC Service Centres and they donot have the price list of anything know. I dont know what to do and feel really upset and cheated on this whole episode which has happened on me. Hence i would request you to look into this matter and help me getting justice on this.