Micromax Informatics — Handset Faulty

Address:

411027

I have purchased micromax e457 on january 16 2017..and later on i discover that this handset is faulty .
1)GPS not working
2)over heating problem
3)cannot connect to pc via USB
4)once conected with charger automatically heating starts unfortunately cannot call after cahrging..

once it was repaired still same problem is there..
i made a request to replace my handset with new one as it under warrenty and only seven days have passed from the purchase date .but i was refused for the same..

i want my handset to be replaced with new one as it faulty handset and is under replacement warrenty..