Mica false advertising

On face book there is a link to promotions being advertising. I make my way Mica Boskruin to buy the taps on special and when I get there the advertised taps were R50 more. Bring it up with one of the staff and he says no that special is over. I show him the promotion and he goes oh you that is the BAMAY12 tap the one here is the CPMAY12 identical taps. The only difference is the two letters at the front. Real convenience in not having the stock advertised.