Zumo boxes and live local stations

Does the Zumo Box actually give you live local channels and streaming options? When I first moved from Xfinity cable over COAX to the new Zumo streaming boxes, when I looked at the guide in the APP and it showed my local stations, when I clicked on any of them it wouldn't play it.  So, since my local stations are important to me, I asked to be put back on regular Xfinity with 10+ Channels and the charge for local broadcast. I was told I would need to hook my old cable boxes back up to the COAX cable.

Lo & behold, my Zumo boxes now let me select local stations and I can view them live. That's just way I want my service (to have access to the streaming and local live TV). But when I talk to Xfinity reps, they tell me I can't have both (even though there used to be something called a FLEX box that let you do both). So, when the order for my service is worked in a few days apparently my Zumo boxes will stop working and I will need to go back on the COAX cable.

Why can't we have both Streaming and Live local TV on our Zumo streaming boxes.  It is clearly possible to do both, but the types of service packages currently offered don't seem to support both.  It is either streaming with Zumo and no local live channels, or regular CATV over Coax where I can get local stations.  I've spent at least 18 hours working with various representatives on this issue. I need someone who is technical enough to understand & help.