Shoprite pelican park- misleading with price tickets

I went to shoprite to buy pampers which was advertised for R99 on the shelf. The description was Pamper disposable nappies/ pants with all different pack sizes

When I got to the till the cashier told me that the price don't go through. She then called one of the managers, who then said that nr 5 pants is not on the list. (Not according to the G7 shelf label)

I know you price you see is the price you pay within reason

A tall muslim guy who is also a manager came and just said "no not that one" without having to explain as to why the shelf edge ticket and the advert in the paper is different

I am really disgusted with how the matter was treated. Yes shoprite is 5 minutes away from where I live, and yes I might be just 1 customer who would take my money elsewhere. I'm sure another branch would appreciate my few cents that I add to the target.