Coolpad - Coolpad India is stealing data from my phone.

I am using Coolpad Mega *.*d since * years. Everything was going good till an update (v***) was provided by the company. After updating my phone from v*** to v***, it started downloading malwares automaically i.e., without my permission. Even after uninstalling these apps they are again able to download by itself. I have tried whatever i can, need to resolve this problem.i think every user of coolpad mega *.*d is facing the same issue because while searching on google, for solution, many people had given their bad reviews on this concern in different blogs and pages.
Kindly resolve this problem, if you can!! I will be highly thankful to you. Because i am facing issues while using internet on my phone due to this reason. I am using *G as my preferred network in order to prevent malwares from being installing.