Repeated 2hr Outages re-occurring since January

My internet has been unreliable for the last month or so, ever since Xfinity did some work to "enhance the network" in my area on January 15. The issue appears to be happening throughout the neighborhood (based on some conversations with neighbors) and the fact that the issue comes and goes without any changes to my wireless router specifically. 

Since the January 15th "enhancing" work, I have received 5 separate notifications from Xfinity (on January 19, 23, 26, Feb 5, and today, Feb 9) that there is an outage in my area. These outages tend to last between 2 and 6 hours. This is an undercount in terms of the total number of outages, as it does not include the smaller service interruptions that have occurred but without an accompanying notification. These smaller interruptions tend to last under half an hour. I am getting extremely frustrated by this, and the $15 service credit is not sufficient to compensate me for the lost time spent during the work day. Please advise on how to get this permanently fixed.

The issue is not limited to wireless internet, as my computer is directly connected to the router via ethernet.