Micromax Informatics — Micromax canvas spark

Address:

122001

I had bought micromax canvas spark q380 on 27/07/2015. After few months, the phone stopped working properly. There was an audio problem. I went to the micromax service centre, sector 12, gurgaon on 02/04/2016 to resolve the issue. I was told that the phone will be repaired and returned back within 10 days. However, today it's been almost 1.5 months and they are still saying that it will take more than 30 days to resolve the problem. The details are as follows:
Model code: sermob0664
Job card no.: n[protected]
Problem reported: 4402 & 4404 poor audio quality
This is the worst i could expect out of a mobile phone co.. Despite my constant reminders and constant phone calls, nothing is being done. I want a new phone since the original phone is under warranty period or else refund me the entire amount i paid to purchase this unsuccessful phone. I can't wait anymore.