Harrassment by security

My daughter and her partner went to Shoprite tonight only bought a pack of cream buns and was stopped by security and was forced to be searched cause why we don't know Only the two of them was searched and this happens all the time and when they question why they are told not to tell them how to do their jobs. The manager of the store says that they only do that when they suspect someone *****ing when I asked how are they searched all the time he couldn't answer me. The Shoprite dawn park management team and security have no way of treating clients especially coloured people as it's a black dominated area and this is not on