Switching to Xfinity Mobile - Horrible

I’m at a loss of what to do and how to contact to escalate the issue of mobile services. The in person store has been absolutely horrific with employees incapable of offering support or help and stating managers are not available for more guidance. I have called the mobile service line more than 6+ times and even had to redo a port on a line. The line still does not show up on our billing and is somehow lost somewhere but the service remains in tact? How is that possible. Looking for this issue to be remedied immediately and further escalation to the FCC. Any guidance is better than what I’ve received thus far after 3wks