Micromax — micromax unite 2 shows low memory space for 8 GB internal storage

Address:

Pune, Maharashtra

I have a micro max unit 2 mobile and it is continuously showing error of low memory . I have remove unnecessary appps also moved to External storage. It says email service stopped due to low space memory. I have brought this phone with 8 GB internal storage now the company says that for app there is only 0.89 GB space allotted. then what is the use of 8 GB internal storage ? I need minimum 4 GB for apps.