Bad service and rude behavior from Bongiwe in Virgin Active Sandton CBD.

I received terrible and shocking service from Bongiwe who is stationed in Virgin Active Sandton CBD branch. I've ordered a smoothie and she never added milk i m not sure about all other necessary ingredients. As a result there was no taste it was just purple water I had to throw it out of the window and drive to another place for another glass. Then I went back to the Kuai CBD lay a verbal complain and she was not on duty I told the lady who was in charge that time . Until I met Bongiwe again this morning. So i told her my query and she tells me that she didn't like how I complained to her colleague and expect me apologies to her for complaining to her colleague instead. She was very rude , showed no remorse and she was not willing to take any responsibility for her actions . That's when I realized that Virgin Active and Kuai are not taking customers serious.