Business/Extra Growth include web hosting as part of the total package. Separate shared/WP/VPS SKUs in the shop are for those who only need hosting or want to scale up outside the package.
Do you still have questions after following these steps? Contact TripleZero iT support via the ticket system or email. Always mention your domain name and a clear description of the problem, so that we can help you faster.
View other articles in the knowledge base for additional explanations about hosting, email and security.