Bad customer service and incorrect pricing

I bought a garlic that said it was R19.99 but when I got to the teller it was R44.99, I told the lady the price it was incorrect, then the lady went there to check, I saw them moving the prices, when she came back she said the garlic was placed in an incorrect place, so I ask to speak to the manage of which it took me 20 minutes waiting for the manage when he got there as I was trying to explain my story this lady ( Patricia Makweya) who happened to be a supervisor kept interrupting me, so I could not explain what happened. I was so upset an the manager just stood there did not have anything to say. Now I waisted 20 minutes for nothing. The customer service is worse. They are phones are not working, it just goes straight to voice mail.