Utter disrespectful service

I was at Pick 'n Pay that's situated at the workshop and I received utter disrespectful service from the man by the name Riaz. He totally was rude towards me and told me rudely that I'm bouncing, whereby under no circumstances do you tell a customer that they are bouncing, hence I have heard so many people complaining about this Pick 'n Pay that is by the workshop. The workshop Pick 'n Pay employees are taking advantage because they are in the center of CBD where as they are serving mostly black people (90%). I have previously shopped at Pick 'n Pay that is at Musgrave and I've never ever experienced such blatant behaviour from that store. The workshop Pick 'n Pay needs to be reviewed and if my complaint is not taken seriously and not action is taken I am prepared to take it further.