You will first need to get an excon line installed with Telkom where you will pay them per month for the rental of that voice portion and whatever calls you make. Do not sign up with them for ADSL as you will sign up for that on the Afrihost site.
You may sign up for a line speed on your ADSL and we will activate it for you on your line. Please see the packages here (each of our packages has a SIGN UP NOW tab beneath it: https://www.afrihost.com/site/product/adsl_lines
To determine your line speed you can contact us on 011 612 7200, send HELP to 32541 or contact our live chat guys so you sign up for the right line speed.
We also have capped data packages at https://www.afrihost.com/site/product/adsl_capped
and uncapped ones at https://www.afrihost.com/site/product/dsl_uncapped
If you struggle to make sense of any of this contact us and we will walk you through it.