Promo 3for2

Bought 3for2 promo OSH range only to find out that I had to pay full price for all items as the promo only covered 200ml 350ml bottles shampoo conditioner hair serum and hair treatment... Stock should then be repacked accordingly on shelf as the promo ticket was placed Infront of the 700ml shampoo and 680ml conditioner, it's confusing to customers and feels like a *******.