Iphone XS not getting unlocked/xfinity incompetence and suspect behavior

Well, in doing a search on this forum I see this is not the first time this has happened.  I am trying to switch carriers and one of the four phones I'm switching is not getting unlocked.  Why it was locked in the first place is another question and issue and red flag again xfinity, but I will explain what happened here so that there is record of it, as another person's post about this same issue may be helpful to me (I just need to follow through on it).  I have been on the phone or chat no less than 9 times in the past week and a half, currently been on for more than an hour, ticket made a week ago, multiple people including a supervisor saying they would follow up with me (don't worry, I never held my breath that they would, but super annoying they would say it), and the phone is still locked.  I bought the phone (iphone XS) outright from xfinity in 2019 (which is why there never should have been a lock on it...I didn't finance it or anything, just though it would be easier).  Unfortunately I didn't get apple care on it, and in 2020 I got the screen of death on it. I took it to Apple who then offered me a refurbished phone which I bought outright, then took to the xfinity store to transfer.  Since then it has been switched to my husband's phone, then my daughter's, then now my son's, all at the xfinity store.  Xfinity opened a ticket and is telling me they cannot unlock the phone because they didn't lock it (because I bought it from apple), but apple says they can't unlock it because Xfinity locked it.  I finally demanded that another supervisor contact apple while I was on hold and explain to him what he was trying to explain to me; supposedly he did this, I then spent a half hour with apple support only for them to tell me nope, there's still a carrier lock and you need to call back xfinity.  XFINITY INCOMPETENCE....STAY AWAY!