Paying normal prices at the tills, but items advertised outside the shop as a special

On 22 March, I went shopping at the Menlyn branch because I saw they had a R 30 weekend.

I bought Hot Cross buns, not the ones that are excluded, the normal ones. I also bought other "specials" advertised outside the shop for the R30 weekend specials. I paid, but when I got home, I saw that the items weren't as advertised, and I paid the normal price. The manager is all over the floor, but the clients are paying the correct amounts. I will never go to this branch again, so people, please check your prices at the tills.