try an email to the support team and see if they can change it for you?

We have people with similar issues.

One was attempting to change his email, the system tells him that it can not send a confirmation email to his address as it is not a valid email.

(it is valid as we all message him there and it is the email he used to create the account in the first place - he is someone i invited to the game via email many years ago)

Another 4 changed their credit cards for various reasons, and can not use the new cards.  They have been attempting to contact support but get no reply.

I contacted support on their behalf - as have others in our coalition that can recieve email from support, my ticket was closed and marked as "solved" by support.

If you can figure this issue out PLEASE post an update.  There are others that can use any information you can provide on this issue.

Please specify these ticket IDs and I'll check if there is anything I can help you with.