Upset FlySafair customer

I missed my 07:40am scheduled flight to Jhb and was put on standby for the 12:40 by the gentleman working at FlySaFair counter at King Shaka Airport. He then instructed me to come back just before the flight departs to determine whether or not I could make it on that flight... As instructed I came minutes before the flight, when I arrive back at the counter minutes before I’m told that I’m late and could not be squeezed in, so again in disappointment I ask when the next flight will be available and if he could put me in for that one, he tells me about a 16:20 flight.. So after having left my details I leave the counter and now I have to wait at the airport for almost the whole day... I arrived at the counter an hour before take off again and I’m welcomed by a different lady who I tell about the experience and ask her if she can put me on standby, the lady next to her answers rudely and alleges that while the gentleman was talking to me for the second time I walked away, I ask her, how when he took my details and I left, worst part is I’m desperate.. I ask her to please have the gentleman come out to advocate that what she claims is false, she tells me the gentleman has left his shift. There’s nothing they can do for me coz I was rude... I tell her that miscommunication is a deplorable performance on their side that they need to rectify because I would have left after being told that I wasn’t able to get another flight after the 12:40 one.. I’m very upset, I missed my flight and an interview from a university that was interviewing me for a tutoring position. Major inconvenience.