Porting Issue Lasting Almost A Month

I have had the same unresolved issue trying to port a phone from T-Mobile to Xfinity Mobile. At the beginning of January, I attempted to transfer 4 lines over. 3 of the lines transferred successfully. The fourth line did not work. I think the original issue was potentially on my end. I think I may have typed in the code incorrectly. From there it's been a big mess. I am wondering if anyone knows what the hold-up might be.  Why is Xfinity unable to resolve this issue? 

Things that have been done...

1. The issue has been escalated to a level 3 department and the porting team. (Whatever that means.) I was promised multiple times someone would reach out but alas. 

2. The port was canceled a week ago and the sim cards were canceled. The phone was eventually removed from the account. This seemed good to me. A fresh start. 

3. We tried another sim card but the port still did not go through. 

I have no idea was this is not working. I seem to be the only one who actually cares to even resolve the issue. Meanwhile, I am having to pay two phone bills for this month. I have been promised credits as well but nothing shows up on the bill. Xfinity says it will show up at the end of the month. Is this accurate? 

My only mistake is switching to Xfinity Mobile. If you are reading this and you have not yet made the switch please go with any carrier but Xfinity. The terrible customer service alone is not worth any amount of money you will save.