Travelstart "rebookable" tickets is a **** and their customer service provides no "service"

I booked an international flight for myself, my wife and child to Norway. The final leg outbound would only arrive at 23:00. After confirming I noticed an earlier option for that leg is available. Since I paid an extra R2500 for the option to change dates I called them to request a change to the earlier flight. They claimed that flight is only available for business class passengers. I then recorded video of my screen proving that the flight is, in fact, available as one of THEIR option for the exact dates etc I want. I offered to send them the video. Or even to change all my flights if needed. They kept on trying to avoid helping. After insisting they honour their rebooking policy the phone was put down in my ear!

I called again and was routed to a different consultant. Now they told me that the economy seats are only for NEW bookings. These seats are not available to them for rescheduling. Why do they then give me the option to select rebookable flights AND charge me R2500 for it?!?! The fact that THEIR systems limit them should not adversely affect MY service.

I asked for a full refund and was told they will refer to their cancellations department and I have to wait 24 hours. Will have to wait and see how this plays out. All I can say is that they just lost a customer who used them many many times before this. They used to be my first stop on any trip I planned. Until today I would have been happy to recommend them to my friends. Seems I was wrong. Once they have your money they stop caring. I will not use them again in future. No one this bad at customer service deserves to stay in business