Consumer Redressal

I need to lodge a complaint against micromax india. I got a defected phone from them(they recently agreed that mother board had problem and now they are changing the same.) I have been suffering from unpredictable phone and lost so much valuable time due to this. I cant forget about the inconvenience and confusions I had to bear due to this phone during my last two abroad travels. The email exchanges attached below will share the level of frustration I have been through for months. I don\'t like the fact that Micromax team feels that there is nothing that I can do about the trouble they have been to me. I will like to file a consumer forum case of substantial amount penalty. Please advise how to proceed.