Port RCF/RACF Number

Hello,

Years ago we had Comcast set us up with the ability to use an existing (Verizon) phone number we had set up in a different section of town. At that time we were told that Comcast was unable to port the number to an actual Comcast Voice number and instead were given the option to use Remote Call Forwarding to forward that number to a newly assigned Comcast Business Voice number. This process has been set up and working fine for years however I am now at the point where I want to port out our original number to another carrier and I'm getting stuck.

My understanding is that, when we set up the new account, phone numbers, and RCF (years ago) that Comcast ported in our original number as sort of a virtual inbound only number that can be used for RCF. That original number shows up nowhere on our actual Comcast bill so I'm getting push back from the new carrier about transferring it in. However, the "Remote Call Forward" feature does show up on our monthly bill and I think that is probably tied somewhere under the covers to our original number.

Can someone, who understands how ported RCF numbers work inside of Comcast, help me figure out what I need to do in order to get this number released? I called into support today and received a ticket number for my case. This individual originally wanted me to call Verizon (who we no longer have an account with) and then they said to call Level 3 (who we do not have an account with) and then finally told me to have the new carrier call into Comcast Business support. Maybe the carrier calling into support will work but I have concerns that they'll get a bit of a run around. Is there a smoother way to do this?

Thank you