Go to "About Me" in your online account and click the 'Change' button under your phone number.
Enter your new phone number in the boxes and click confirm
Enter your password so we can be sure it's you making the change.
Your phone number will now be changed!
If you would rather contact us please send an email to firstname.lastname@example.org, providing the phone number you would like as your main method of contact. We will confirm once this has been updated.