Careless attitude

On the 2nd of Jan we have received an sms notifying us that our flight from Durban to JHB has been changed to 13:55, we have arrived to the airport 2:30 beforehand and after standing in a long queue to check in, we have been told that our flight is full due to over booking and we can only fly at either 18:45 or next morning. Otherwise we can get a refund for our ticket. When we have inquired why we were not notified to the change if they were aware of it since the morning, their reply was “take it up with the managers “ . Zero effort to assist or even try to explain, completely careless attitude on behalf of Mango personnel. We have decided to wait the remaining 5 hours in the bid west lounge but we’re denied free of charge entry nor a voucher for a meal. Bidwest allow free of charge entry only two hours prior to flights. When Bidwest representative asked Mango to either pay for our early stay or give us a food voucher, both were denied!! Careless service, no care attitude!!