As you can see from the top note in this forum, this is a user to user communication platform, and we users cannot help with such account specific problems, because we have no access to the database where the router serial numbers are held. You would have to report this incident to firstname.lastname@example.org.
Assuming you are trying to set up an account to get your free host name via d-link. While Oracle + Dyn provides the services for d-link, we do not have anything to do with account provisioning in this capacity. You will need to contact d-link customer support regarding this.
Oracle + Dyn