xfinity support

I have checked several posts about how to disable the xfinity hotspot on my modem/router. The wifi hotspot is causing a double nat situation with my VOIP phone and I can't receive calls. 10.146.200.107 is still broadcasting. I put the xfinity modem in bridge mode and disabled sip alg on my tplink router but xfinity is still broadcasting 10.146.200.107. After doing some research it looks like this is caused by the wifi hotspot. I tried to disable the hotspot on both the xfinity app and via this the link provided in this post https://www.xfinity.com/support/articles/disable-xfinity-wifi-home-hotspot but nothing works. Is there a setting that I can change on the modem to stop the wifi from broadcasting?