Ok the way I see it is the Artist name is the one you have when you sign up. I know it’s all good saying with hindsight but pay attention on sign up No just kidding. I understand that new names come about as I’ve witnessed with friends.
I can’t see another way to change it yourself. Perhaps send an email to the admin with details of what you want for a new name etc and they can fix it at their end.
All we can do is the artist URL. So try the above.
I have noticed quite a few new options in the profile section so obviously Twisted dudes are working on new things so it could be on the books to do and is just a matter of time.
Take it easy all