Sorry to hear that.
Don’t know if my symptomns were the same than yours, for me it was like “screen blackouts”, random, non dependant of any action on my part on the tablet.
All I can say is, again, it dissapeared after formatting, making a new legit Windows 10 Pro installation and applying all the drivers located at this webpage, named “Cube i7 Book i16 Drivers Win10 64bit”