Our neighborhood no longer has reliable internet after an "upgrade"

Xfinity sent everyone in our small cul-de-sac of 43 homes a message 2 days ago that they would be working to "improve" our internet. At 5 pm we got texts that it was all good and "upgraded." Since then we all have signals that come and go, disrupting things constantly so much that I have just taken to using cellular data. Our group signal chat shows no less than 4 households have ordered Starlink! That's 10%. [Edited: "Profanity"] Xfinity? Help us out here!