Porting a number BACK to xfinity

4 days ago, I got new phones and moved part of my family to a different carrier.  We also have XFi Internet FWIW.

1 member of my family is away at college, so my intent was to keep him on the same account.  When changing our phones over, I accidentally started the port of the number that I intended to keep with Xfinity.  I tried to cancel the process but apparently it was too late.  Talking to support on both sides, it sounded like I just needed to port the number back.  Note that at this point I was unable to call or text the kid who's phone no longer worked.

In trying to complete the port BACK to my XFi account, the CS agent I was working with wanted to know the IMEI number for the device.  Since I could not longer see the device in my account, or talk to my kid to get the a IMEI, I asked if the phone# could be put on the device that it was previously on.  The agent said yes, and then said the device wasn't compatible with XFinity service!  After some back and forth, they indicated that they found a workaround in the system.  Supposedly the port completed successfully from there.

Now, a couple more days later, I was finally able to get through to the kid via email.  Did I mention it is "finals week" and the kid is super busy and doesn't have time to deal with phone issues?  Anyway, I got them to give me the IMEI # from the phone itself and guess what?  Right, the IMEI number did not match what I saw in the account.  It was the same model, after all be bought 3 Pixel 5as from Xfinity at the same time, a few years ago.  But they had linked the phone number to some other Pixel 5a.  To be clear, if it is one of the other 2 we had (one of which is bricked), it is in the wrong city for the college kid to use.

So, I contacted CS again and alerted them to the issue, asked them to change the line to use the correct device.  Again they told me, again, "the device wasn't compatible with XFinity service!"  You know, the same phone # on the same device in the same XFi account that had worked 4 days ago.  This person didn't try much from there, just suggested I go to the Store and get a compatible device.  Not sure he knew or cared what I was supposed to do with the phone from there.

Finally to my question:  Is there someone here who can help me?  I just need the phone# configured for the correct device, the one that it was previously.  Please let me know how to proceed.