rude red/orange head assistant

I have frequented Herbert Evans in Fourways for many years, my 3 boys grew up and are adults now on their stationary. I went on Sunday morning looking for a specific color. One assistant approached me to ask if she can assist. I told her I cannot see the color, but I will take something else and mix my own. I continued to browse in the store, Im an artist and I love the products they have. I noticed almost immediately this same assistant was following me around. if I turned into the next isle she was there looking at me waiting for me. I was in the store about 20min. She never left me aloe. At the till I said it made me feel really uncomfortable. I have been coming there many years. The red (orange hair) assistant told me they must follow me because people steal and that is that. Even though I understand they have to have security protocol. the way she addressed me was rude and obnoxious. I spend R419 in the store, and I left in tears being treated so badly after being a loyal client to them for more than 20 years.