Delayed flight disgusting service

I flew to Cape Town recently from Johannesburg on business. The flight was delayed by almost 3 hours and no one from the airline could give me a proper explanation as to why the flight was delayed. The delay caused me a whole lot of inconvenience and also a business loss. I sent numerous emails to the airline and never recieved a single reply. I called the call centre and they gave me another email address to which i then sent another few emails. To date i haven't received a single email or call from them. It is utterly disgusting that such big companies operate on this basis.