Line transfer between accounts

Having a heck of a time getting success transferring an existing line from one Xfinity Mobile account to another. Two chat sessions, a visit to Xfinity store in person, and talking to two different representatives on the phone I cannot get movement on it with no explanation why. I just get referred to someone else or hung up on. I seem to be getting the run around on this, what is the best path to escalate the issue? The knowledge base article below mentions it's possible, was there a change? 

https://forums.xfinity.com/conversations/xfinity-mobile/how-do-i-transfer-a-line-between-xfinity-mobile-accounts-answered/68d2f8761c1ab67c002b92ab