Tell them the following:
You will have to withdraw your submission and resubmit to the correct school site.
To withdraw, login to the site where you submitted, click on the “My Dissertations and Theses” tab, then click on the Revise button for your submission. On the next screen, in the left column, click on “Withdraw this submission”.
To submit to the correct school, see the links to the school sites under “Submit Your ETD” on the ETD website.