Thank you for your asking. Kindly provide the information below so that we could better assist you.
1. Model Name: Settings>System>About phone>Model
Refer to the link below to check the model name by model no. in the linkhttps://www.asus.com/support/FAQ/1014441/
Is your model ZB555KL, ZB556KL or else?
2. Your current firmware version
Setting >System>About Phone>Software information
If you try to update to the latest version, does the issue still remain?
>Screen has started waking frequently on its own
Does the issue start after any system/app updated/downloaded? How many times a day or any hour? Will the issue happened in "Safe Mode"?
>randomly cut out charging
While change a new charger , have you tried a new cable as well? Will the issue happened in "Safe Mode"? According to the whole charging time, does it have a huge difference than before?
#How to enter and exit "Safe Mode"https://www.asus.com/support/FAQ/1005163/