Train your staff

I called in to change my flight as my internet connection was slow only to be handled poorly by your contact centre agent, Joseph. I had to repeat my flight information as well as the change of details only to be met with the incorrect route. I called in at approximately 09:10. Then I was provided incorrect information regarding the change of price, R500 instead of R487. I am not certain why this is happening? I then managed to change the booking online however when I tried to change the name and make the payment, your online service indicated that the payment method was currently unavailable? Is this a deliberate ploy to get people to pay an additional R100 to change their flights through the contact centre?