Micromax Informatics — Micromax in Note 1 Motherboard short circuit & Warranty claim

Address:

Micromax service center Palarivottom

I have purchased a Micromax me note 1 mobile phone through online 8 months ago.
One day it went switch off and we were not able to switch it on.
We given the phone to micromax authorized service center in Kochi, Palarivottom as it is in warranty period.
They took the phone inside and after sometime informed that its motherboard is shortcircuited and repair charges will be 6000 INR.
And they cannot provide warranty as phone screws looks to be try to remove by any local shops.
We have not given the phone to any other shops but directly to that authorised service center.
We need immediate repair or replacement.
We have contacted customer care almost 20 times but no support.