Gateway Replacement

Hi, 

I would like to get a gateway replacement as I have constant network issues, specifically related to accessing one of the websites. I did all the troubleshooting steps by the Xfinity Assistant and contacted our company IT. We ruled out any possibility of laptop malfunction and restarted my home network multiple times. At this point, I wanted to talk to the live agent to get the replacement started, but couldn't reach them. Can you please advice on how to proceed – I really need this to work.