Update DTV South Africa: The short of it is they still do not have any information about the DTV, cost or procedures and asked to follow up mid August.
You cannot go to the Pretoria Embassy in person anyway they won't let you in. I had to speak to an officer over the phone. She said it'll be likely that the DTV application will be done via a courier service. The VFS agent knows nothing about the DTV either.
TLDR : Answer Summary
As of now, there is no detailed information available regarding the DTV visa for South Africa, including costs and procedures. The embassy advises following up in mid-August. It seems the application may need to be processed via courier, as in-person visits to the Pretoria Embassy are not allowed.
DTV VISA RESOURCES / SERVICES