That is CORRECT!
DAN is not an Emergency Service Provider - or ESP.
An Emergency Service Provider -- or ESP -- is a public/private system aimed at the provision of emergency ambulance service, including emergency care and transportation to a hospital.
DAN-SA does offer a 24-hour hotline for diving emergencies. However, DAN liaises with Emergency [Medical] Service Providers such as Netcare 911 and ER-24 as needed to arrange the necessary transportation to the closest, appropriate emergency medical facility.