@Gunt 

Try to login to the router web GUI to confirm if the wireless network name had been changed, then run a Wi-Fi analyzer on a computer to confirm if you can find the corresponding SSID.

If no luck, change the wireless channel to another one, such as 1/6/11, channel width to 40MHz, then reboot the router.

You can also reset the router to factory defaults by pressing the reset button, or tap the Factory Defaults on the router System page, then check if the default SSID is broadcasting.