Poor service - Airlink

I am so devastated with the poor service that I have received today from airlink at Bloemfontein - Braam Fisher airport. I have checked in online very early and when I get to the boarding gate, the boarding pass couldn't load the QR code. After being told that I have to wait there as one of the attendant is checking at the flight for me, they only came back later to say that the flight has been closed and I have forfeited my ticket. I then had to book the next flight at an additional cost of R2295.56. I believe this is not my fault and I deserve to be paid my money back.