Sonoff - The $5 WiFi Smart Switch That's Compatible With Alexa And Google Home
This switch is also available in South Africa for around R125. It's spec rates it for 90 - 250V at 50/60Hz and a max current of 10A. That means you could fit it inline with lights, fans, etc and have Google Home or Alexa turn them on or off. Each switch can be named for easily controlling different devices in the home. You could even use something like this to turn a TV and lights on and off while you are away from home, to fool any would-be burglars.
Watch a short video on how to use one of these switches at http://bit.ly/2BH7xfo