I sent the following to their advertised customer care e-mail address of We_can_help@cable.comcast.com:

I pay around $250/month for 40mb/s service and two telephone lines. I would think that would entitle me to some facsimile of service but that does not seem to be the case. I've had your service for approximately ten years and in that time my modem/router has been replaced at least that number of times.

It seems that all I get when I call 1-800-391-3000 is screeners intent on dismissing rather than fixing the problem and whom have ZERO technical knowledge, script readers who go through some procedure that is totally inappropriate for the problem at hand and which provides NO resolution and if I manage to get one of them to admit there is a problem and generate a Tier II ticket, then your Tier II folks close it out as NTF (No Trouble Fixed).

I am having intermittent Internet connectivity, and the problem is NOT with my modem, my connection, or the provisioning there of. How do I know this? Well let's start with the connection, the connection is the SAME connection that provides my telephone service, but when Internet goes out, my phone continues to work. How do I know that it's not my modem? Well, other than the fact that it's already been replaced about a dozen times, there is the fact that I can do a traceroute and I have zero packet loss to the first hop outside of my modem, and only about 1% to the next hop beyond that. Where things fail is around the 7th hop where, when it's down I can get that far but no further.

Anyone who knows ANYTHING about TCP/IP routing would understand this is NOT a local connection issue. Unfortunately, I am not convinced there is anyone in Comcast who fits into that category. I know Century Link is even worse as I switched FROM them, but this service is NOT ACCEPTABLE.

And in response to this I received:

The original message was received at Tue, 29 Mar 2022 02:45:34 -0400
from m0184892.ppops.net [127.0.0.1]
> ----- The following addresses had permanent fatal errors -----
> <We_can_help@cable.comcast.com>
> (reason: 550 5.4.1 Recipient address rejected: Access denied. AS(201806281) [MW2NAM12FT023.eop-nam12.prod.protection.outlook.com])