Comcast had "maintenance" outage and now my wan keeps dropping and comcast cant see my modem.

Comcast had "maintenance" outage and now my wan keeps dropping and comcast cant see my modem. I have a service call tomorrow but how do i get engineering to fix their head end equipment. I am in Roseville California.

Diplexer mode change errors in logs and t3 timeouts and ucs invalid or channel unusable. Signal power levels all over the place.