Consumer Redressal

Sir i have brought a micromax phone before six month , with in one month there have a problem to start coming in my phone it restart itself and hang regular.Then i go to micromax mobile costumer care and handover my phone two times for resolve this issue but they have not rectify this issue and told me that we can not resolve this issue because this type problem in all same model phone. In my regular follow up they always repeate this answer again and again. sir kindly guide to me how i submit my complaint in consumer forum.