Completing medical studies in South Africa.

Hi, my name is Joy and currently I'm a medical student of the University of Benin in Nigeria. I've just concluded my pre-clinical MBBS exams and would like to transfer to a medical school in South Africa, perhaps the University of Cape Town, University of Limpopo or University of Pretoria, to complete my studies. Do these universities accept international student at that level and what processes are involved in transferring. I would also like to know any website I could check to find out more. Thanks