The uncapped wifi packages most people are after, are in fact just a Fibre Internet or Telkom LTE connection with a wi-fi router. See also Telkom WiFi Deals
Uncapped wifi deals still needs some sort of "external internet connection" to bring the internet into your house and then connect it to wifi router. The wifi router will then give you uncapped internet in your house.
Telkom customer service portal for lines, adsl and bills
Telkom Internet Portal
Manage your Telkom Internet related queries.