To activate a cancelled domain you would need to send us an email from the primary email address to firstname.lastname@example.org and we will Re-Instate your domain services for you. You would need to make sure that the domain had not expired during the time it has been cancelled unless if it was transferred to a different host, and also make sure that no one has registered the domain if it has expired. Check on http://co.za/whois
to see if your domain is still available under your details and when it will expire. If it has expired and no has registered the domain, you would need to hurry and let us know so that when we re-instate your domain services we should also queue the domain registration.