Literally straight after I wrote my comment I received the AM email. It took me 5 minutes to work out what they were trying to say, it is written badly.

However once I realised just needed to confirm, I then received the AM confirmation email and verification number which I entered.

From original confirmation to acceptance of confirmation took 60 seconds.

Then recieved a confirmation email "Thanks for updating your information! We have confirmed your updates of your account (membership number: XXXYYYYZZZ) on your account details at 'Date/Time'"

CX could have come up with a far easier way of doing this.