Nedbank Private Wealth, its either linked to the Platinum credit card or the Amex, not sure, but both included as part of the package. Off the top of my head, I've used lounges in the following airport/cities: Dubai, Paris, Barcelona, London, New York, Orlando, Mauritius, Singapore, Amsterdam, Frankfurt, Dusseldorf, Larnaca, Zurich and some others... they were all pretty good, at least as good as Bidvest, and some MUCH better. I get a card and so does my wife, we take our daughter in with us and have never been billed extra for the 3rd person.
https://www.prioritypass.com I suspect they give us the Prestige level as I've never been asked to pay or told I'm reaching any limits.
Edit: I wanted to add... I had to ask for this service when we upgraded our accounts with Nedbank several years ago - and I must say, it is the single most valuable feature/benefit I get from them