Internet Connection Dropping

I've had intermittent internet connections being dropped over my WiFi network. I finally dug into the logs for my WiFi and for my modem, and I've found that my modem had a lot of errors over the last day or two, which is corresponding to the internet going out and not coming back up within 2 minutes like it normally does. The logs show critical errors related to UCD invalid or channel unusable, SYNC timing synchronization failure, no maintenance broadcasts... things like that. My WiFi logs don't show any issues related to the WiFi network.

I was notified that Xfinity completed work in my area to fix an urgent network performance issue on Aug 21. The work didn't decrease the amount of internet connection drops, and it was really bad over the last couple of days. A tech was out the year before and mentioned that not all of the channels were "bonding" at my home... but nothing was followed up that I can tell.

Is there any way to chat with someone to take a look at either Xfinity's logs or my logs to see if there are any opportunities for a fix?