Disappointed

Today I went into dis-chem and wanted to take advantage of their special that they currently have.. Buy 2+1 and get cheapest 1 free. In the perfume aisle I took 3 perfume that said buy any lenteric, coty and I love perfume to qualify for the special so I purchased 3 one from each brand and at the till they said I can't get the special because it has to be 3 I love or 3 lenteric or 3 coty but that is not what the poster and adverti*****t said.. Worst is that the till never even ring up the promo and there was no staff that knew what was the actual promo.. But staff at the till was so friendly.. I ended up buying just 1 because it took me 3 tries untill I gave up. Really disappointed