Hi CB64,
Thanks for your post and welcome to the forums. It's great having you on board with us in the Community.
I can see that 用心棒 has offered some great advice to get your emails all sorted. If you have any further issues then please let us know.
In terms of your online account, this may change your nickname however we would need an official change of name form to be able to update your account itself. If you haven't already done this, please have a look here for the steps you need to follow. Make sure you're looking at the 'How to change the name on the account' section.
Keep us posted on if you have any further issues or queries.
Thanks,