I am South African and I would rather eat hot tar than take a regular taxi.
Ask the hotel to get you one and pay the rip off price or, ah can't remember now their name. I will report back.
They use white Mercedes Vitos and have red branding on the side. They are good. There drivers like to talk which I don't really so I send my mother on them that way she doesn't whine on the phone to me about what ever trivial thing is currently bugging her.