All part 141 flight training schools will be respected by JAA. They are all accredited by the South African Civil Aviation Authority (SACAA). They are audited annually to check that they are compliant and have one or more ad hoc inspections through the year. So they are all well monitored.
Each flight school that is accredited has to display it's accredation on the premises and has a number, eg CAA/0016 . (always CAA/ followed by a 4 digit number)
You can see a list of accredited flight schools on
South African Flying Schools and scroll down.
Hope it helps.