why are you deleting your account?
I'm not sure if this same for artists, but when I go in settings below "Don't need the account anymore?" It says "remove my account" If clicking that doesn't work or if you want to just want to remove you status as an artist, but still want to keep the account then perhaps contacting the admins might help.
the icons at the bottom of the "menu" have links to FAQ and chat with support
Try those for an answer?
How do I delete the account?