Can't Port Forward

I haven't been able to access the port forwarding page of the Xfinity App for a week.

I have spent a collective 8 hours on the phone and XFinity App with various agents and supervisors.

4 of them have said a Specialist would call me back. No Specialist has ever called me back. I have confirmed the number with the agent each time.

I have gone through the steps in this guide multiple times with agents:
https://www.xfinity.com/support/articles/port-forwarding-xfinity-wireless-gateway

The Port Forwarding page on the App says:
"Something unexpected has happened. We cannot display your details right now. Try again later."

If I go to the admin tool, it shows this message:

Managing your home network settings is now easier than ever.
Visit xfinity.com/myxfi to set up port forwards, among many other features and settings.

With no other options available on the page.

With various agents, I have tried uninstalling and reinstalling the app, signing out and back in under both my mobile number and my xfinity id, trying to access it on a different phone, turning on and off Advanced Security, perform a hard reset, perform a factory reset, and go to the XFinity Store and replace my modem with a newer one. All of which I've done with no fix.

I even had a technician sent to my home. He informed me that he there was nothing he could do and no reason he should have been called out to help. But he did run into this issue with someone else before. The solution was to buy a 100$-300$ router and bridge the connection myself. 

I have been told just recently by a supervisor named Tahir that this is apparently an ongoing issue. But just like the 4 agents who told me I'd be contacted and I never was, I'm skeptical. I assume they have a quota of people to assist, and I was taking up their time. One week for complete inaccessibility to port forwarding is a long time for an ISP to take to correct, considering how common port forwarding is for hosting servers and other important features.

Honestly if XFinity can't even do port forwarding, then there's no reason to keep them as a service provider.