Refuse refund or partially refund

I had a booking for a flight to Port Elizabeth for my daughter on the morning of 5 February 2016.Departure time was 06h20.We left early to be in time for the flight. Unfortunately we were delayed due to circumstances beyond our control. We arrived at OR TAMBO 40 minutes before departure and were refused entry because we were \late\". After begging and asking to allow my daughter in she was still not allowed to enter. No empathy, no smile and absolute cold treatment from the Mango ladies working there. I understand the rules, but to refuse at least a certain percentage of the money back goes beyond my comprehension. Surely Mango can accommodate passengers that is late due to genuine reasons. Surely they could have made an exception and allowed her in. I lost R769 plus the R400 for the person to bring my daughter to OR Tambo. We are ordinary citizens and R769 is a lot of money. I am disgusted in Mango. I can understand a penalty fee for being late, but to loose the full amount. Shame on you Mange for exploiting passengers like that!!! "