FALSE advertising At Checkers Eldoglen Boksburg

FALSE advertising At Checkers Eldoglen!! An Adverti*****t for the current weekend( 30/09/2023) as well as the Red price tag on the promotion shelf both state: buy 3 and get the cheapest one for free. At the till they I sisted on us to buy 4 to get the cheapest one for free. From my understanding is this FALSE Advertising