Once you login you will see the "Deactivate Profile" button on the right of the Dashboard as shown here - imgur[dot]com[slash]ZIni7qg
provided that you have completed your profiles and already activated it.
If you are trying to re-created your EE profile for OONP, you cannot use the same email address. What I did was use another email for old jobseeker profile, by changing the email address from settings page and use the same email to open the new jobseeker account using new codes.
hope that helps.
thanks.