There is still a dial-up service, you can use your Karoo user name and password to get online with it, I've used it before when the ADSL connection had failed.
However, I don't believe there is any real support for it, I suspect they might support you with it if your ADSL connection went down.
I was referring to the old ancient dial up services
Karoo AnyTime (unmetered)
Karoo HomeTime (unmetered after 4:30pm)
Karoo FreeTime (unmetered after 7pm)
Karoo NetTime (metered)