Restrict daughters phone

[Jdotnot]

I have two phones that I pay for on contract. Mine and my daughters. I need to restrict her usage but am unsure how to do this..... I can restrict our broadband/WiFi but how please can I restrict time usage, cut off data at set time, make her realise that he'd behaviour doesn't warrant such privileges. She us 16 and behaviour is appalling. Please can someone help me 

[bristolian]

Is your daughter's phone within the minimum term? If no, then 30days notice to cancel is the ultimate sanction.

Physical removal of the phone would be an option in the meantime.

The myEE app allows mobile data to be disabled manually, but restriction of usage with time limits needs the controls baked into the OS.