Lenovo — Lenovo zuk z1 issues along with marshmallow update

Address:

560061

Hi all, i have purchased this phone a month back from amazon india, it has promised a lot but :

Hanging issue,
Heating up during usage and charge.
No update on marshmallow as of now (Ota)
Many times it does malfunctions, like wise disappearing the icons at desktop, touch screen become non responsive, and finally worst is it would not even wake the screen sometime.

Request you to look into the issues, even every social media, groups, forums have mentioned these issues of zuk z1, so please fix these problems dear lenovo.

Thanks
Nagaraj mm