Cannot add unlimited data (xFi Complete) to my account
About two weeks ago, I learned both that I could pay a bit more than what I was paying to get faster 1Gbps (1000Mbps down/30Mbps up) service on the xfinity network and that I could also pay more to get unlimited data (which my understanding is referred to as xFi Complete. So, I got a new modem which could properly take advantage of the higher downstream bandwidth and I upgraded by speeds, which added +$30/mo to my monthly charges as expected. My understanding is that to now add unlimited data, xFi Complete would also add an additional +$25/mo to my monthly charges, but it seems that to get unlimited data using your own modem ther is an additional $5 charge. So then my understanding is that in my case it would actually be another additional +$30/mo instead of an another +$25/mo.
I still want to add the unlimited data for another +$30/mo, but when I tried to add it (by going to https://www.xfinity.com/learn/internet-service/data and clicking the "Go Unlimited" button underneath where it says "Keep using your own modem and router, and add unlimited data for $30 more a month than what you’re paying now." — but it only showed me a screen with an error message that said:
> Temporarily unavailable
> The product you’re interested in isn’t available for purchase at this time.
That was about two weeks ago so I decided to try again later. I've tried it a few times since then with the same result, and I just tried it again with the same result. A moment ago, while I was trying to figure out a way to get it added, I also tried going to this page for xFi Complete (https://www.xfinity.com/learn/internet-service/xfi-complete) and clicking the button toward the bottom of the page that says "Upgrade Now". This one did not give me the temporarily unavailable error, but it gives me a screen that looks like it will allow me to add xFi Complete, but it only has the +$25/mo option and says it will require me to use the xFi gateway, and there is no option available on the page that allows me to add the option for using your own equipment for +$30/mo.
Please add unlimited data to my account OR more ideally, provide me with a working method of modifying my plan to add/remove unlimited data to my account while continuing to use my own equipment.
Also, not sure if anyone here will be able to answer this, but I was wondering if anyone could tell me if there was some non-obvious reason the fact that I'm using my own equipment should have anything to do with or is in any way relevant to whether (or not) I'm allowed unlimited data as part of my plan?