Error XRE-03062 - Select Channels - Music Choice

I have been unable to connect to Music Choice Jazz (via channel 945 or 1594) via my TV box, though I can access it on my iPad via the Xfinity app. The error message says "Sorry, we're having trouble connecting." This has been occurring for over a week. Several bot chats and live agent calls could not rectify the situation. A tech was sent to inspect lines, box, etc. Still unable to connect. The only solution is to use the remote's microphone to request the channel, which takes you to a separate site. It takes more than "several seconds" to retrieve it, but at least it's accessible. However, then I can't easily switch back and forth to other channels like the news. This only seems to be problem for a few Music Choice channels; I can get most of them of via the channel guide. Xfinity needs to fix this on the back end. It doesn't have anything to do with the customer's box, cable, plan, etc. The error message says "our teams work to fix the issue as quickly as possible," but I see no evidence of this and would like to be shown some proof that Xfinity is actually doing something to fix the problem.