Comcast piggybacked an xfinitywifi hotspot on the Comcast Business router they installed for me. When I asked Comcast to turn off the hotspot, they told me to

Comcast piggybacked an xfinitywifi hotspot on the Comcast Business router they installed for me. When I asked Comcast to turn off the hotspot, they told me to disable xfinitywifi using the Comcast Business web-based administration page. However, toggling the options on the page failed to disable their hotspot. Comcast said that I had discovered a bug, and that as a workaround they could disable the hotspot manually from their end. This also failed to work. In the end, I had them replace the router with a much older wired-only model.