Hello @Amanda1010 ,
Welcome to the community,
You could either take the phone off him or take the SIM card out of the phone.
Another thing you could try and do, not sure about this one, but either log-in to the App or website and click on his number and see if you can do anything from there, otherwise doubt that there is anything else you can do.
The trouble is, he could either borrow a friend’s phone and still make the calls or depending whether he has any money, buy one somewhere and put a pay as you go SIM card in it.
To contact EE customer service dial 150 from your mobile phone or ring customer service for free using Skype or another phone: +44 800 079 8586 or +44 800 956 6000.
