Horrible service from money market consultant

Today I booked a Mango flight online and selected Shoprite/Checkers payment option. I get to the money market and I am attended to by Lebohang Motase. She was the rudest person I have ever encountered. When she was done, she comes back and tells me I need to pay. I asked her why is her amount different to what I was quoted online to which she rep**** and said that it is because of printing charges because she needs to print my itinerary. I then asked her who requested for a printed itinerary. Instead of her explaining herself, she turns to her friend and requests that she go and call the manager as if I was asking an unreasonable question. The manager comes, his name was Carl Meirring and needless to say; he was unable to handle the situation. Instead of offering to assist me with the matter, he just kept saying that he will address it with the cashier. I expected them to assist me and ensure that I pay the amount that I was quoted online as I did not request for any printed proof. I even explained that at the airport, my flight confirmation on email can be scanned off my smartphone after I've completed my online check-in. I walked away from the Checkers at Centurion Mall a very dissatisfied customer. I ended up going back online and using my credit card to make the payment.