Vrot Service Mango

Booked a flight in November Tambo to Cape Town for my son .... planned it carefully as he had to fly Hoedspruit to Tambo to catch this flight. We left 3 hours between flights. Last week Mango unilaterally changed the flight to 15h15 .... a little tight but still doable .. Less than 24 hours before the flight it got changed via sms again ... to 13h15! Obviously he cannot make the flight .. Called the call centre and was kept holding for FIFTY ONE minutes .... must be a call centre record. The young man who finally answered agreed the situation was bad but the later flights were fully booked????? He was still trying to sort it out when the line went dead .... I tried calling back ... Saturday office hours are until 17h00 ... so even calls that are happening are cut off mid conversation!!! I have now paid for a direct flight from Hoedspruit to CT. All in all spending R 11 000 to resolve a problem that Mango caused. I want heads to roll and my money back. I am nervous as I have 2 return tickets early Feb to CT ... is the same going to happen ...