Thank you for posting to the Xfinity forum. Sorry for the issues you're having. I know exactly what you mean when you reference the billing system and rate codes. It should be a pretty simple fix. Can you send me a private message with your first and last name before I can begin troubleshooting? To send a private message click on my name "ComcastChe", then click send a message.
Thank you for giving me the chance to help resolve the CL-13 error on your TiVo. As I stated in our private message, let us know if there's anything else we can assist you with. Thanks for being the BEST part of Comcast, take care.