South Africa: colonization of Africa by Africa?

The silent takeover of Africa by South African businesses ^[1]: “According to the State Of The Nation: South Africa 2003 – 2004 (7), available documents show South African businesses running the national railroad in Cameroon, the national electricity company in Tanzania, and managing the airports located in or near seven African capitals. They have controlling shares in Telecom Lesotho and Mandisi Majavuare the leading providers of cellphone services in Nigeria, Uganda, Swaziland, Tanzania, Rwanda and Cameroon.”