Mango Airlines have inept staff and poor policies

Our flight was scheduled for 17:45. We were at the airport ready to board at 17:15. The flight controller refused to let us on the flight saying that boarding was closed. We were directed to guest services where we paid R470 to get a later flight. On our new ticket for the later flight said boarding starts half an hour before the flight takes off. It makes no sense. We also had no bags to check in. Just hand luggage. Poor customer service and a complete *******. Mango needs to upgrade their calibre of staff or train them better.