Clicks city view Centre durban

Worst service ever. First time I went to buy a product which was on special buy 2 and get the cheapest FREE. The lady at the till says it's not on special. Today I went back to Clicks and I saw it was on special. I went to pay for it she says it's not on special. I took a photo of the price to show them. She calls the supervisor and he says that I can't take pics. It's being after 3weeks since I went back and that product is still not on their system. I am very upset. Waste of my time.