Consumer Redressal

I purchased MICRIOMAX CANVAS DOODLE from ZOOP Mabile store at Charni Road, Mumbai - 400004 on 28th July, 2013 but that was a defective device as the android carshed and reapired itself on the same day. later the problems wprsened and the phone used to hang and does not respond.i got the replacement from the vendor after getting the DOA from the ANDHERI service centre after waiting for 10 hours. the vendor gave me a replacement on 13th August, 2013 and on 20th August, 2013 the replacement given to me is also having the similar problem. it does not respond and restarted 3 times. now i am unable to open any games and applications on that fone. I sent an email on service.superfone@micromaxinfo.com but the mail bounced back. i spoke to Saurabh in customer care on 18605008286. they now say that i have to get the phone repaired,but why should i get the phone reaired? i have paid Rs.10250/- for an new phone and not a second hand phone that i should reapir it. wats the guarantte?