If you are looking for a Masters degree that would include training in CBT, it might work best to identify approprite Masters degree programs and then check to see what they offer in terms of training in CBT. I haven't looked into Masters degrees offered through distance education so I don't know what is available.

You might also check with Dr. David Edwards in the Department of Psychology at Rhodes University in Grahamstown to see if he has any suggestions about training that might be available in South Africa.