Frequent internet disconnects

I have been experiencing more frequent disconnects with longer down time.  My WIFI shows I am connected to it, but states there is no internet.  I chatted with a service rep who didn’t answer any questions about outages or similar problems in the area, but recommended I purchase a new modem.  I currently have a COX provided modem.  Looks like COX has given up on customer service.  How do I contact someone from COX who can solve my problem?