Comcast has announced that it has completed an investigation that found there was an error in its billing software that led to customers being incorrectly charged for exceeding their data allotments. Comcast says that the customers who were charged by mistake will be given bill credits and an additional $50 credit.
Comcast admitted its wrongdoing

Source: Hot Hardware – Comcast Admits It Falsely Charged Customers For Exceeding Internet Data Caps