Unable To Upgrade Due To Error With Xfinity System

I have been dealing with this issue for over 3 weeks now: I have had my mobile account since October 2021. I am looking to upgrade both of my current lines as well as bring over 2 additional lines and purchase new phones for those. I have been wanting to upgrade my "Bring Your Own" devices to the new iPhones since the end of September during the iPhone promotion that ended on 10/4 or 10/6 (I believe). When I tried upgrading on the website, I was getting an error that says "You’re over the number of lines you can have on device payment plans. For one or more lines, you’ll need to pay in full or bring your own devices to continue. Or you can reduce the number of devices in cart." When I tried to go to an Xfinity store, there were getting the same issue claiming that there is either an issue with my credit through Experian or there was an internal issue with the Xfinity system. I contacted Experian customer service an was able to confirm that there were no freezes to my account and no issue with my credit. I have contacted customer service and escalated my call to the advanced support team, who has had to also contact the Tier 3 support team, every week since 10/6. A ticket was created for this issue but there has been no resolution. 

The lack of resolution for an issue that is not caused by the customer has been utterly heinous. This is over $4k in business, not including our monthly service charges, that is being missed due to Xfinitys inability to have an efficient service system. The number of times that I have traveled to an Xfinity store for an issue only to be told that I would need to contact customer service to resolve it has been more than I can count.