No internet connection

For the last 3 days my wifi hasn’t been working on either of my tv’s. I have tried restarting the gateway, unplugging everything, restarting both tv’s. Nothing is working. The WiFi works on my phone, my laptop, my iPad but not either of the TV’s for some reason. I tried calling the customer service line to get help, no real person to talk to, I tried scheduling an appointment, it wouldn’t even let me do that.