Humiliating search at Shoprite Primrose Germiston Branch

I went shopping at Shoprite liquor @Primrose, Germiston this afternoon 17th September 2021. And when I was on my way out after I didn't find what I was looking for, the security guard from Safeguard Security Pty Ltd stopped me and ask where is the staff I bought and I told him I didn't buy. He started searching me and I had not problem with him searching me but the manner in which he did the searching felt so humiliating and so rough. I told him that I respect his job but I don't like the roughness then he asked me to go report him which I did and hope they address the matter.