Disgusting service

I booked a return flight via travelstart on the 20 September to return on the same day ie. leave in the morning and arrive in the evening. So the cheapest option was Durban to JHB, depart 8:40 am and the return was JHB to Durban departure at 20:50. I opted for this option did the necessary payment and without checking printed this e-ticket. My morning flight was smooth vand I attended my business meet and went early to the OR Tambo airport and tried to get an earlier flight out. I was shocked as the lady advised me that the flight had already left at 9.50 the very same morning. I had to book an emergency flight out which cost a further R1450. I did phone travelstart on the 26th september and spoke to Bronwyn and then after the run around redialed and spoke to Brandon... Oh Brother!!! Still no manager contacted me, after a lot of empty promise. I phoned again on 4th OCT 2017 and spoke to Nikita Mtetwa and I was promised that someone will contact me shortly. Its obvious nobody cares. Seems to be a common thing these days. I thought their software was flawless, well ! obviously not. How is it possible that their software approve the times of same departure from both JHB and Durban for the same person. RIDICULOUS. This is a no brainer, travelstart must refund me.