Cemair does not refund or credit

I booked a flight 20 Feb at 9am, for the 21st of Feb. I took a more expensive flight as the time was better for me. At 5pm, 20 Feb, an email was sent to me saying I am rebooked on a new flight (later the same day) I did not see my mail and arrive at the airport at 05:45am. I then found out my flight is cancelled and I am flying at a less convenient time. I asked the lady at Cemair what I should. She referred to the cemair desk. I asked them what I can do they said I should call after 7am and explain to them. But i am booked on the next flight and they can not assist me. At 6:50am I booked in and called the call centre, where the gentleman explained to me I SHOULD NOT HAVE EXCEPTED THE FLIGHT AND CANCELLed the flight. Got a refund. And rebooked. 2 different counters of cemair could not explain this to me. So in the proses it cost me R600 more. Please be aware of this. Cemair is a great flying experience. Unfortunately staff is not well enough trained and the airline is not as jacked up as other airlines. Pity. Makes you want to think twice before using them