Consumer Redressal

I purchased 1 Micromax mobile Canvas 2 A110 (Rs.9500)on 13/08/2013,its battery get dead within 45 days. I requested to replace my battery in Micromax service center located in virar(W) they given me time for replacement of 7 days but when i queried for my battery they told me to that its still in process and you have to wait more 20 days. Dear Sir, I am a student and i always required my phone to be in communication with my college for study details notification. so please do the needful.