I've Cancelled My Services, But There Is No Escape. Fraud, Auto Pay, and Dead Phone Support Lines.

I cancelled my services with Xfinity at the end of March because I was moving into a house that already has internet service. Everything was fine for about a month, until... Last week I received a notice that I had an upcoming bill of $70 as well as another bill scheduled for the following month for $65. I opened up the app and saw one active mobile line (I never used my mobile line). I used the live chat feature to speak with an agent who informed me that a phone number I do not recognize was using the line, and the number was added by a device I do not own. The agent directed me to the fraud team who resolved the issue within 20 minutes. However, I knew that didn't mean I was safe from future fraud. So, I took steps to protect my account. I changed my password and added two factor authentication. I then tried to turn off auto pay so that I could remove my credit card from file. Xfinity is clearly very loosey goosey with who they let set up shop in your account, so if something like this happens again, I want to be sure no payment can go through. Like I said, I'm not currently using their services so I should be able protect myself from fraud. Here's where we go from shady to downright despicable.
YOU ARE NOT ALLOWED TO TURN OFF AUTO PAY FOR MOBILE LINES. And you are not allowed to remove payment that is being used for auto pay. You can change your payment options, but you cannot have no payment options. This is gross. If I am not using your service, I should be able to remove all forms of payment. In fact...
AUTOMATIC PAYMENTS - TERMS AND CONDITIONS - SECTION 3
"YOU HAVE THE RIGHT TO TERMINATE YOUR AUTHORIZATION AT ANY TIME ONLINE BY LOGGING INTO YOUR ACCOUNT AT CUSTOMER.XFINITY.COM AND TERMINATING AOTOMATIC PAYMENTS OR BY CALLING YOUR LOCAL COMCAST OFFICE AT 1-800-266-2278 AND TEMRINATING YOUR AUTHORIZATION WITH A COMCAST CUSTOMER ACCOUNT EXECTUTIVE."
Method 1 described above failed. The website DOES NOT allow you to turn off auto pay for mobile accounts. Period. So I tried method 2. I called. I called and I called and I called. Every. Single. Time. "Your call cannot be completed at this time. Please try again later. Message 6, US01LV." I tried 3 different support numbers. All of them are dead. I know it's not my phone that's the problem. I can call other support lines for other services. And if the lines are just busy, I should be able to get in and put on hold at some point, not perpetually locked out being able to call at all. Xfinity is making it as difficult as possible to use their resources and failing to hold up their end of their own terms of service. It's disgusting. I'll be attempting to get this problem solved via the support ticket the bot under this post will prompt me to make, but I just had to put all this out there for everyone else to see. I wonder how many other people have had this problem and if things will ever change.