Landline Phone Plans

Trying to cancel a landline phone for over a week. Given a confirmation number. Called back then told a supervisor must approve my request. Why does a supervisor need to "approve" my request to cancel. Twice I have been told someone would call back to approve no one has called. I just want to cance

I currently have autopay to a checking account. I added a credit card into my information, but it isn't saving the changes when I ask it to charge the credit card for autopay in the future. Help!