Mango dont care attitude by *********** staff

I am absolutely shocked at the bad attitude of the mango airlines staff . This moening we had a flight to cape town from or tambo at 5:55 . We arived at the checkin counter before 5 . The que wad extremely long and the check in process took forever . When we eventually arived at the counter we were told that the boarding was closed and that we need to make flight changes . I confronted the supervisor on call Nomhle Nkosi had this dont care attitude and she wad addimant that she did call for durban and cape town . Ahe also said that her manager Bianca van Zyl is not their.This is the first problem if mango's information systing / calling system is ineffective then they can not blame the passengers when they do not hear but they must look at a more efficient system . We then did a flight change which cost me an exstra 6800 for 4 passengers for the flight at 8:10. Wen we went to check in nomhle was at the counter to book us in . She them told me that we need to ho back to the imformation system as we are on standby . I was furious by this time as no one said anything about standby. She was on the phone and then she told me that i need to have a seat she will bring our boarding passes . I insisted that she give us our boarding passes which she eventually did . They were quick to take my money but to put us on standby again !!!!!We are regular passangers and this is the first time ever that we had such apalling service i will never fly with mango again !! I will report this to her manager bianca van zyl and if necessary i will repiry this to bianca' manager me weltsman as well . Poor poor service !!!!