Mango Cheated us, refusing to refund us

My CEO bought a set of tickets online fot a flight. When he got to the airport on the day of his flight he was told that his tickets could not be found on the system and did not exist. He then had to waist R2000 odd more on buying a new set of tickets, as he had a meeting to get to... When I phoned Mango Customer Services and they finally answered the phone, the told me that they could see both tickets, but that I had to Email all the info to Mango Refunds. I did this, and Mango Refunds promised to do an investigation.<br> <br> All they keep saying is that : \Cannot see anything wrong with ticket