Bad service at frontline cash and carry, Bloed Street, Pretoria

I went to the Frontline store in Pretoria, Bloed Street on the 03/11/2018 to buy an article which I thought was on special. To my surprise, the article charged a normal price of R30.00 at the till, although they displayed a promotional price of R26,99 on the shelf. When I raised the issue and demanding my refund, I was sent from pillar to post, while the returns supervisor (cashier Karabo-Karabo) was busy complaining as if I was annoying her. I tried to report the matter to management who told me they have nothing to do because the rude returns lady is the only one that can help me with my refund. I was so disappointed and annoyed of the service I received from the store. This needs to be rectified very soon (e.g. put correct shelf pricing and all this will be avoided)