Welcome to Vodafone Community
A member of the team will need to do this for you.
They will see your post I'm sure and help as appropriate.
Current Phone > Samsung Note 20 Ultra 5G - SM9860 Snapdragon.
Samsung One Ui 2.5 / Android 10.
@M360 You can if you wish re-register yourself with a different name but to do so you will also have to use a different email address to that which is being used for your current user name.
Otherwise you will need to hold on until a member of the Vodafone team sees your post.