Change of Email Address

Hello I am a new member and trying to sort out an issue for my wife's SIM. I phoned customer care, just to change her email address! and they arranged to de link her account and payment plan. I have received their confirmation. I was advised to register for a new account and payment plan.
That's where the fun begins! I have been trying to register her details on the app, get so far ,and wait for a verify code which never arrives . This has been going on for 48 hours. Please can someone sort this!
Thank you

Does anyone at Customer Care read these issues? Case raised CAS-2980888-S3H9L0 relating to above. Just want to set up new account under new email, so I can add a new payment plan.

DavidG43 No customer care! This has been going on since at least July. "Community" manager does not respond. You are not the only with this problem. What happens when the old email address no longer works!