Terrible Attitude

I usually have breakfast and lunch meetings at Traumerei UFS campus. I asked to change my order from a sprite Zero to an orange juice. A huge issue was made about how this is not possible. The manager was called and she gave me a terrible attitude saying that a change results on a void. I then approached the owner and was so disappointed when the owner told me i dont know what goes on behind the scenes as a customer, ultimately i am not qualified to make a complaint. He further informed me that they were supposed to be closed and the staff are workig over time and so i ultimately cant chop and change. This was definitely the last time i support this franchise and i wonder if this is the culture at all the traumerei franchises. Owners need to be more conscious about the quality of service that their businesses deliver. This is the new South Africa.