SAA from Excellent service to Don't care service

I love SAA, been booking with them for years. Today I made a mistake and chose the wrong destination, whilst booking for 4people. Once I processed payment I realised that I made an error and called immediately. They refused to assist, they changed with a penalty fee of R230 per person, which was R920 for 4 people and up till now I haven't received the correct e-ticket. I called them numerous times and I'm told I made an error on my side, so I must pay the penalty fee. I mean I called them whilst the payment was still pending but they refused to assist and demanded that I pay the penalty fee.