I have a aris tg1682g and I'd like to use ethernet only and disable the RF radio at times.

I followed directions here https://www.xfinity.com/support/articles/hide-disable-in-home-wifi

To disable the wifi bands. Worked great the first night, however, the bands came back on. Not sure why or how. Being unable to access the gateway to follow the same procedure of disabling them because my wifi network does not appear. Although I also never clicked anything to hide the name. Both 2.4 and 5 are still on at this point.

I know i can reset the gateway, which is basically my only option now- but i dont want to go through that much trouble every single time i simply want the RF off.

What's the simplest way to be able to have the option of using ethernet only?