How can I log my ex-wife's mobile phone off my account?

[Frustrated1too]

I'm needing to log off my ex-wife mobile phone, so she can't send everyone a refund after my work is done!!!

[anasaralee]

Have you tried changing your password and selecting "log me out of all devices"?

[Ron]

Simply change your password and no one can access your account without your new password.