Xfinity Mobile is using an old personal email although I’ve updated the preferred email on my Xfinity account profile

We recently switched back to Xfinity Mobile. We have been Xfinity customers for wifi and security all along. The Xfinity preferred email has been changed a while back. However, when we went back to Xfinity Mobile- all the order confirmations went to the old personal email. How do I get the Xfinity Mobile profile updated to reflect my Xfinity profile email?