Cancellations and renewals and double charges.

Useless customer service, poor communication around the cancellation and move of a line resulting in a double charge for the month. I cancelled my line so I could move if (why I can simply not transfer a line without cancellation and starting a new contracts beyond me) on the 1st day of the month as opposed to the last day of the month which was apparently "not a full calendar" month and have now been charged for both lines in 1 month. It would have helped if the customer service person who spoke to me before I was about to cancel the account had mentioned this.