Advertising misleading

I went to macro to buy a printer and with that service I was happy. At the toiletry shelves there was a sign saying that you could buy any of the 3 products (sanitary products) for R60. I thought that was a great deal and picked 3. I notices that one of the products was more expensive than the rest but on the picture of the green notice right there by the products it had all of them. So I thought I would take what I want because of the picture. When I got to the till to pay, the lady said that I could not have that product and I told her that I would go get the adverti*****t on the shelf (which was on the other side of the shop). When I came back, she had to call her supervisor and then the supervisor said that it was only for the others. I reminded her that it showed it on the adverti*****t and she left with all the products ( I guess to speak to someone higher). After a couple of minutes she came back and said that I could not have them.<br> <br> I was unhappy because they had made the mistake not me. I think from my point of view they could have given that promotion to me. Sad that the supervisor could not think for herself. I left disappointed.