The free plan is just like the pro plan, but is limited to up to 100 orders per month.
If you're needing complete control on the order status page you'll need to upgrade to the plus plan.
If you're wanting unlimited orders and don't have a need for customizing your status page just upgrade to the Pro plan.
If your wanting complete control over your status page (i.e. ability to change the template) just upgrade to the Plus plan.