I totally agree with freightboss. I think you should take the matter further with the SACAA and SA police. Yes, the SACAA might not be all that, but at least you will put a bit of pressure on them, and if you are lucky, they might even do something about it. And the SA Police, well, yes they are busy, but if you lay a charge against someone, they have to look into it. And they will. They are really not all bad. They can do a pretty good job. So try that route.
About the Air Schools, I can HIGHLY recomend 43 Airschool in Port Alfred. They are the best in the Country! Try their website for more details:
http://www.43airschool.com . My personal oppinion and experience, they are the best.
Good luck