SA Airlink is a no show

I am very disappointed with the service I have received from Airlink's Management Office. I have been trying to get hold of a supervisor and refund department from 5 September. No one has answered their direct office lines ever since and no one responds to my emails nor the flight agent from Airlink at Nelspruit airport who is trying to resolve this matter. Who can I contact with this matter? Are there even real staff working at Airlink??? How is it IMPOSSIBLE to get through to someone???

I booked online to fly from Cape Town - Mpumalanga the same day I was supposed to fly (on 5 September 2019). When I got to the airport, the assistant at the check-in counter informed me that my seat was cancelled. I had to run around the airport to find out what was going on since I had received a booking confirmation form from Airlink and the money had gone off my account. They informed me that it takes 2 days for the money to clear out of my account and thus I should rather book a ticket 2 days in advance. How come your online booking are then open to book the same day you need to travel?

I had to then book and pay for another ticket but was charged the following day's fees which was more expensive because bookings close 2 hours before the flight. They said that Airlink will just refund the monies as I had paid double for 1 flight. I have ever since tried to get hold of someone who can assist me and till today no one has responded to my emails and the 2 office numbers I was told to phone: *** and *** for Margret, only rings and goes over to voicemail. How can this situation be resolved. I would like feedback urgently.