Consumer Redressal

I bought HTC Mobile Desire-X on 07/11/2012. Within 3-4 months, its headphone got the problem and it was replaced in HTC TVS Service center. Within 7 months, Its motherboard got the problem and it was replaced in the same centre. Now, my mobile again has some problem since, its motherboard was changed, 2-3 months ago. I showed it to HTC TVS service centre, VidhyaVihar, Mumbai again. They are saying that the motherboard will have to be changed again and I have to wait for at least 1 week. Now the problems my mobile has: When calling, mobile display should go off, but it doesn\'t. For incoming calls, sometimes the caller\'s name and number is not displayed. I am facing these problems since after the replacement of the motherboard.