Unmarked security guards following young woman in pick n pay boskruin

So my wife and son are busy buying groceries at the pick in pay in Boskruin yesterday when she starts feeling like 3 males are following her and pointing fingers towards her. Out of desperation she calls me to come to the shop because she is scared that they either want to ***** our son or want to hi-jack her when she gets in the car, upon my arrival at the store having come from home she says she is so scared she just wants to leave the trolley and go home - as we are walking out one of these men follow us and smiles at my son - as I confront him and ask him what his issue is,he just laughs - After a heated argument he tells me he works for pick n pay - I immediately go to the store manager and he actually confirms that these 3 are security guards pretending to be shoppers - Can someone please explain to me who came up with the idea to have 3 unmarked men following a young woman and her child throughout the store, making her fear for her life and her chillds?