Micromax — Micromax canvas a210 not yet repaired even after 1month 7days

Address:

Nalgonda, Andhra Pradesh

Hello sir/madam,
I KIRANMAYEE bought the above said phone in suryaprt BIG C on 31/3/2014, suddently i noticed problem with screen, that i can not see anything in my phone on 29/06/2014, i went to store and complaint the same they asked me to visit nearest service centre which is in Nalgonda my brother he showed my phone to nalgonda where they said its a motherboard problem it will take 15 to 30 days time to get reoair as they need to send this to bangalore. and they didn't give any standby phone.
Now its almost 1 month 7 days and they keep on postponing and telling this is not their mistake.
Is mistake is mine who spent 15, 191 INR to buy this phone, waiting for my phone like a begger. This is not fair, do something and return back my phone with good working condition or else refund my money.