Pick n pay Pinelands involved in king cone ****

I went to buy a king cone ice cream. The freezer said R19 the scan at till was 22. I asked for the manager- he checked- agreed that there was no specific flavour stipulated but that he had to \confirm". He disapears and returns 15 minutes later to tell me that the promotion they running (I'm unaware of any promotion in any case) does not include this flavour. I become irate - I have now wasted 20 minutes for this impotent man to tell me there's nothing he can do. I mean"