Issues with Xfinity Stream on Multiple Devices

To anyone at Xfinity,

I recently reactivated Xfinity services at my address (Internet & TV). I purchased 1 DVR box and planned to use Xfinity Stream to access my in-home channels for other TVs via Roku devices.

My cable box is all setup and receiving channels, but my issue resides with the Xfinity Stream app on Roku. Everytime I authorize the application and attempt to access Live TV ON MY HOME WIFI, I receive a "TVAPP-00500" error code. I've also attempted to view channels ON MY HOME WIFI on my iPhone/iPad and am only able to see TV GO channels, without any filters applied.

I have called customer service at least 3 times, had 1 technician visit the home, had my case elevated to Tier 3 support, and still nobody has been able to assist me. I believe it might be an issue with an old Xfinity ID tied to my address - either mine or my grandmothers - that is sending conflicting information.

I do not want to do further troubleshooting, as I have done that with the customer service reps and technician, and I refuse to pay for 2 more additional TV boxes when the Xfinity Stream app is designed to operate in situations like my current household. At this point, I need to have the previous Xfinity IDs deleted or have any personal information linking them to this address removed so I can access my channels. Otherwise, I will be forced to cancel my TV service.