5ghz internet not working

Ok I get it, do not try and tag the ticket, if I have to type this thing out one more time I’m gonna flip. My internet has a 2.4g and 5g version I’m sure you know, 5g is much faster and I need that for work. The 5g stopped working. I cannot connect to it. I have restarted the modem, I have troubleshooted in the app. I thought it was range but now devices right next to it can’t connect.