I'm going to pay for the tickets in JNB as soon as they will be issued in order to avoid the SOTO price here in Germany.
In the current reservation, which can be checked via checkmytrip.com, the agent is mentioned as DEUTSCHE LUFTHANSA.. location to be added.
So the JNB office has just to recall the reservation number and put in their office code as issuing agent. Then tey can sell it as SITI ticket and we're ready to take off...

Michael