loafty

Hi Corky, I have an LG smat tv model: 65UK755OPTA, I go to settings, network, wifi connection.. there is nowhere that allows me to switch on or off the wifi. It says in there (WIFI is turned off. Turn it on to see the list of available networks) I have to select my network and connect then I have wifi but like now I am not connected to wifi and NO networks are showing for me to select, this is my problem and don't know what to do to fix this issue

Tv connects to wifi and can stay connected for couple of days then I will switch tv on and internet (wifi) will be disconnected so go to connect up again and tv can't find any networks so turn off and unplug from power wait 5 to 10 minutes then plug all back in go to wifi settings might be lucky to find my network select and enter password and works again. Only thing is I got a different modem from internet provider and they have told me that the modem is working fine but I have never had an issue like this with tv before. Tv states wifi is turned off but I can't find anywhere that I can turn wifi on in the tv, does anyone know ?? Tried calling LG didn't get much help at all, I am 71 years old and just want my tv working the way it should so hope someone can help. Thanks