FlySafair - Worst customer experience evey

My son was booked on a flight at 8:15am today the 27th of Feb. He arrived in time booked in his luggage and then went to the boarding gate, at 7:45 only to be asked to step aside and let other passages go through that were on the earlier flight. When they eventually (him and at least 15 other passages) were allowed to check in they were told the boarding gate was closed. I phone at 8:27 the call centre only to be told that he must go to the service desk and had to pay another R300 to be put on standby. It is now 1:30 and he is still 24 in the queue, because of the mess up they made by overbooking their flights from 7am. I cannot get a refund or book him on another flight at that will cost me close to R3000. I would like some to phone me with a solution to this so that he can at least come home this afternoon.