Misleading and false advertising.

FALSE AND MISLEADING ADVERTISMENTS/PRICING

Woolworths is advertising a buy 3 pay for 2 secial on selected chocolates.Last week while the special was running I wanted to by the chuckles and Lindt which were both on the special.When I wanted to check out I notices that the 3rd one wasn't free and I was still been charged about 50%.I mailed my complaint with a screenshot of my dash cart and haven't even heard back from them....