DESPERATELY SEEKING REFUND

I made a return booking with Travelstart between Cape Town and Durban to go visit my husband. My return booking was a complete shambles. My flight to return to Cape Town was booked for 13:45. We got to the airport with enough time to spare. I proceeded to the counter only to find out the flight time had changed for an hour earlier. I was not informed of the time change. I went to the ticket sales office and they told me there was only a flight at 18:30 again. I had to book a flight with another airline to get home at a decent time hour. I cannot get hold of Travelstart or have any contact number for them to request a refund for my return flight. What must I do. Who do I call. Where do I go to?. I am at my wits end