If you are a South African and looking to get an online gambling license, then this article while short, will point you in the right direction.
If you wish to trade in South Africa you will need to speak with your provinces gambling board. They will provide you with the necessary documents. A quick google search will locate these for you.
If however, you are looking to trade internationally, you are probably wondering what license to use?
Have a read here to find out more about Curacao licenses!
http://www.curacaowebhosting.com/2017/11/16/how-to-get-gambling-license-south-africa/