You'll need to first sign up for Afrihost Plus. Once your membership is activated, you'll get an option in ClientZone to activate your username and password. Once your account is active you can use either the Simfy website, mobile app or desktop app to access your account.
Once you've signed up for Plus here:
You can enter ClientZone, click on Other Service and then Afrihost Plus and then click on the Simfy button to activate and manage your Simfy account.