Dis-chem false extra 20% discount

Very disappointed with Dischem. False advertising. They have flyers hanging on the ceiling then they have stickers on products on the shelves advertising an extra 20% off. But in the extra small print it’s only for customers with insurance. You only find this out when you query it at the till. I spoke to a supervisor and she said she was terribly sorry as she also understands it’s very misleading.