Disgusting Service

Absolutely disgusting service, I and extremely unsatisfied. We were 3 minutes late for our baggage check in time due to our IDs being stuck in our rental car and the rental office being closed until 5am (after we were already pre- checked in for the actual flight) they refused to let us in for our flight and referred us to the ticket sales office. After being on standby for 6 hours waiting for open seats, the staff only checked the free seat schedule for the next flight 20 minutes late, which meant allowing a passenger to board the plane only 15 minutes prior to departure. How is it possible that we were 3 minutes late and couldn’t board the plane and were refused access, but when the staff check schedules late then it’s okay for passengers to check in 15 minutes prior departure? When I asked for an explanation from one of the staff members, she simply said she doesn’t know and cannot explain to me because she was not there ? We also paid a R600 fee to be on the standby list only for the above to happen after hours of waiting.