Why is Comcast so keen to keep irritating their customers with scam calls?

Since the beginning of the year the number of scam calls coming on my xfinity voice line has rocketed.

Comcast refuse to cut off the scammers. They claim to be able to add a [V] on the CID when it comes from a verified caller. Why do they continue to connect the scammers that are spoofing the CID when they have the ability to verify the calling number? There is no reason that anyone would ever need to present a CID which is a non-existent number. Any attempt to call it back results in the number being invalid or OOS.

After months of trying to get Comcast to do something and being given the run around. being passed from one inept department to another, they opened a ticket to dispatch an engineer to my house. This is for enormous numbers of scam calls being connected! The physical service to my house is working fine. Comcast's refusal to drop scam calls as they enter the network is the problem. There is nothing at my house that can fix that.

I called a few days ago to find out how much notice I need to give to shut off my service when I switch to a competitor. The guy that answered tried to convince me to stay. There's not much chance of that, but he did tell me about nomorobo which is supposed to handle the scam calls.

I figured that I may as well give it a try while I wait for the new service to be installed. I created an account on nomorobo and tried to follow the instructions on how to configure it. It says I need to go to the settings page on the xfinity web portal and set up advanced call forwarding. When I go there, a few seconds after opening the page the advanced call forwarding settings change to "Sorry, but something went wrong. Please try again in a few minutes." and has been doing that whenever I have tried it for days.

Comcast is just piling on the evidence that they are utterly useless or are deliberately making sure the scammers can keep calling.