Number got changed on changing address, how to get it back?

Hello,

I called Xfinity mobile to change my address from California to Georgia and in the process, the associate created another account within my account (now has two addresses I can switch between). My wife's number is still on my old account address while I was assigned to the new address with a new phone number and my original phone number is "disconnected". I asked him specifically if we will be able to keep our original numbers and he assured me multiple times. Even before I hung up I asked him to confirm both original numbers and he read them back to me. 

I need my original number back. I am a doctor and I expect several phone calls from hospital and elsewhere on my number. 

Hoping for a fast resolution.

Gaurang