Boarding gate rules

Boarding gate closure 45 minutes before flight departure we had to purchase additional tickets at more than double the cost . We arrived at the check-in counter at 5:45 to be told that the flight is closed we then had to purchase tickets to another location so incurring even more cost by changing our accommodation and car rental . Upon arriving for our scheduled departure back to jhb our flight has been delayed by more than 3 hours and we get a 70 rand meal voucher as compensation I find the service from this local airline appalling and would never fly with them again . The staff are unaccommodating and rude.