Constant nightly "maintenance", service disconnections, and no straight answers?!

I have Xfinity 1Gbps internet-only service.

every night, I get a TXT message from Xfinity
---------------
Hi, it's Xfinity Assistant.
We're notifying you of upcoming planned maintenance in your area scheduled for 08/26, affecting service at (address). Work should occur overnight, and during this time, you may experience interruptions to all of your services. We apologize for any inconvenience and appreciate your patience.

Txt help or stop
Msg&DataRatesMayApply
---------------

then every morning I get
---------------
We've completed work for the day in your area, but we have to return on 08/27 for additional work. Your service at (ADDRESS) should be up and running now. Thank you for your patience and for being an Xfinity customer.

Are you still experiencing a service issue?
1 - I'm still having an issue
2 - Everything is working
---------------

This has been going on for many weeks*.  I'm staring at the last ~15 days' of TXT messages ...

Each night, my service is disconnected for minutes-to-hours.  About half the time, I need to reset my modem in the morning.

There's no explanation of what's going on.

I've been in online chat asking for explanation of what's going on, and why I'm paying for 'continuous' service that's constantly being disconnected.

Their response?  They try to upsell me a mobile phone line.
After 'clarifying' to them that there's zero chance of that ever happening, I end up asking for a supervisor.

After a very long hold, one comes online, spends time re-reading the entire thread, tells me they need a "few moments to work on it", then disconnects the session.

Next, I tried to schedule a callback@

   xfinity.com/support/schedule-callback

only to get

   "The Xfinity Assistant can answer most questions
     and connect you with a chat agent if needed.
     ...
     callback is not currently available. We apologize for the inconvenience."

I next *called* the phone 1 (877) 338- 9791 above, and managed (only) to get to a Human in Billing/Cancellations; all other paths seem to take you to endless Voice Trees, offers to use TXT or online chat, blah blah.  The Billing staff person finally acknolwedged the problem after talking to their Technical Support team, and said to get a clear explanation I need to be transferred to them.

I was placed on hold ... waiting to be routed to the "next available representative".
I eventually get to someone, and explain the issue.

Their response ? To attempt to "reset my TV box" (which I do not have).  Once that's clarified, and I "reemphasize" that I expect some answers about why this is happening every [Edited: "Language"] night, I'm put on hold; in a few minutes, the 'new news'? "There's planned maintenance in your area scheduled for tomorrow".

You think?  That's the point! It's every night, night after night! With no explanation/reason provided!

Now, back in the conversations, I just got asked "What are the weather conditions in your area".
Apart from the facts that (1) you'd hope they know, and (2) it's been sunny and hot ... ::facepalm::!

Eventually, after more hold, I hear "Yes, there is maintenance.  To provide you excellent service ..."

uh-huh. Riiiiight. "Excellent service".

How about absolute refusal -- or complete inability -- to provide any answers as to what's going on, and why I'm paying for service and getting this rate/frequency of disconnect?

I cut it short, and asked for yet-another-supervisor.  I was put on hold they just joined the call ...  I started to reexplain the situation to them, focusing on the need for getting some straight answers.
In mid-sentence, I was disconnected ... to a ring-busy tone.

I can't agree more with the countless comments here, and elsewhere -- worst customer service ever.

Hey Xfinity -- what's it take to get straight answers and receive the service we pay for, without the endless area-wide service disconnections, constant platitudes, upsells, and hang-ups?

[Edit: Removed All Caps]