Decidedly Unhelpful

I was able to browse with a cell phone connected to my wifi this morning but this evening I cannot do so. I contacted your support via chat and they were decidedly unhelpful. They told me to get the phone to forget the wifi password but did not tell me how to do so. When I asked how to do this, they said I should go to wifi settings and that is the extent of the information they provided. I am not prepared to pull teeth when I contact support. Tell me where exactly to go and stay with me through the troubleshooting process until the Internet connection has been restored.