Incorrect expiry date

Hi, I recently purchased some stuff from the Parmalat factory shop in Nandi drive, Durban , only one of the stuff was fine , I bought yogurt and milkshake that had expiry dates for August 2015 but when the milkshake was drunk it was sour and that means that the product is expired and the yogurt had full water and had a smell , I laid a complain with Parmalat but to date nobody as got back to me , my child had the milkshake and made her sick ., and the milkshake was bought for school and it was 4 x6 packs and the yogurt 2x <br> <br> The person that I logged the complain was not even interested that the product was expired <br> <br> Parmalat being such a big company and to sell expired products to public is disgusting and to change the dates on the products <br> <br> This will need to be look into cause which othe consumers they lying to.