Shocking service from Cape Town International Check in staff

On Sunday the 22nd of April we arrived at Cape Town International Airport to get on a flight back to Johannesburg. We had already checked in and thus just needed to do a bag drop. We stood in this queue for over an hour trying to check our bags in surrounded by three other extremely long and slow lines. A large number of people tried to speak to the staff to find out why there was such a delay and we witnessed every single Mango staff member being unhelpful and rude to almost every customer. they shouted at people who were complaining, did not respond when spoken to and when they did respond they were rude. our plane was then also delayed and on landing they informed us that some bags had been left in Cape Town. we got to the carousel and there must have been an absolute maximum of 10 bags that came through- this means you left 90% of the flight's bags in Cape Town - how does this happen ? we all stood for an over and hour waiting for the next plane to come in and of course it took them half an hour for the bags to get to the carousel. I was left disgusted by the complete lack of service we received from start to finish. Your employees are in the customer service industry yet have no idea how to handle customers. I understand they were getting complaints from all angles but under no circumstance should your staff be rude and ignore your customers just because they have been shouted at a few times. The only friendly and helpful staff were the air hostesses. Absolutely shocking service- I was embarrassed to be getting on your plane seeing the way your staff at Cape Town International treated the customers