Need help changing my wifi password

I need help changing my wifi password. I have gone threw all the trouble shooting steps. I have tried using the app. My app does NOT have the wifi tab and when I search wifi details on the app I am met with a infinite loading screen. I tried going threw admin access online and it basically barred me from making changes and told me to use the app. I tried calling but the stupid ai refused to let me just talk to someone and just kept telling me to do things I already did. I am at my wits end here