How do i turn wifi fully OFF in Kano OS?

We are using an ethernet cable, and want to turn off all radio frequency devices (including kano’s wifi) But just plugging in the ethernet cable does not seem to turn off the wifi, as i am still picking up polling readings from it, and when i go to the wifi settings, there is no option to turn it off.
So hence my question, how do i turn the wifi off in Kano OS ?
(This is on a Computer Kit 2017 with Light Ring, Raspberry Pie 3 Model B)