Computer keeps reverting to xfinity hotspot wifi after MacOS Sierra Update
Regarding my macbook Pro. I have a modem through Comcast that I use. However, my computer, by itself, keeps on reverting back to xfinity wifi hotspot that is downloaded on my computer. I have tried to find where I can ignore the "xfinity" network on my Computer, but cannot find it anywhere in Network Options under System Preferences. I know how to do it on my phone, but it doesn't seem like there is an option on my computer.
How do I get rid of this "xfinity" hotspot network choice on my macbook forever. I think either someone is trying to hack into my computer or xfinity or some random person is trying to use my modem as a hotspot and I want it to stop now.
Help. How do I get my computer to ignore the "xfinity" hotspot network and get rid of it as an option forever and make sure no one is using my modem as a hotspot?
MacBook Pro (13-inch Mid 2012)