Karbonn Mobiles — Service is not done

Address:

Chennai, Tamil Nadu

i have given my handset Karbonn Titanium S6 for servicing on 14th Mar 2015 at Service Center in T.Nagar, chennai .But Inspite of 2 months time, I have not got my repaired handset back. I have Called so many times . Every time they reply that "The complaint is under process at the service centre. We will get back to you with the exact status as early as possible."... But Today when i called Service centre, they are not responding and disconnecting my Call. (Job ID no.140315P113181 at PMW cares, T, Nagar, Chennai) Kindly look into matter and give instruction to them.