Mobile line stuck on a seemingly deactivated account?

I am moving at the end of this month and let Xfinity know. Instead of waiting until the end of the month (like I asked), they moved my internet service to my next address early. I called customer service and they tried moving it back to my current address. That was able to fix the internet issue, but they had to make another account for me (basically, in the last year I moved from the initial apartment unit I was in when I first got Xfinity, but stayed in the same building so they had to make that additional account for the updated unit number). Now, my mobile line is nowhere to be found on any accounts. My phone is still getting service, I can still text and make calls, but I don't see it on either account. I've been with customer service all day yesterday and today trying to transfer the line from my old account to my new account and they keep saying I have no line attached to any account, which can't be true. Please help!