Bad service

I arrived at Pedros in Eyethu Shopping Centre Soweto around 20:30 and found them closed. I then decided to ask an african male employee there who saw us standing at the door and approached us, why was it closed 30 minutes before its closing time according to the business hours written on their door. He laughed and said they closed at that time because they want to. Not only was his reasoning poor considering that no one was provoking him in any manner but asking him a valid question, but he was also rude and dismissive in his approach