Intex Technologies — product is very bad

Address:

Mumbai City, Maharashtra, 400060

I purchase mobile in march 2018, the battery issue problem i faced within 7 month, i went to service centre i paid battery charges of 650, i received the battery after 40 day and now within 1 week again i am facing battery problem. What kind of product is this?

I am not able to use my mobile for 40 days and again within 7 day i am facing problem. It is not at all acceptable.