Clicks increasing pricing products after promiton has started

Clicks is running a promotion of up to 40% off on as I am hair products from the 24th of February... The price of the as I am leave in conditioner was R160, hydration elation was R180, coconut Co wash was R180 on the 24th which is the day the promotion started. On the 25th the same product under the same promotion is R215. 99. I though your promotional prices were valid from the 24th of February???? Why is the price different on the 25 of February? I have pictures of the prices on the 24th with the upto 40% off promo on it.