I thought my display name was "Mark Dominus", but it seems to be "004". I don't know how that happened; perhaps I changed it accidentally when I was updating my profile. Whatever the reason, the profile page says I can't change it again for 30 days. Meantime, I seem to be stuck with "004".
Is there a way to have an exception made? Whom would I ask?
Thanks for any help.
ADDED: Please note the large red message in this screenshot: