I completed and cancelled my contract of 3 years with AT&T in July 2008. In November I received an invoice for over $600. I immediately called and sat on hold. When a person finally answered and reviewed my account they noted that I had completed my obligations to that contract The mobil number on the account had been assigned to another person in another state. They said they would look into this matter and get back to me within 3 business days. I finally called them back in January 2009 to find out what was going on. AT&T again... read full review »