Disappointed customer

4 of the food items I purchased at Woolworths foods Norwood were expired. This is incredible considering the rhetoric the Woolworths punts. Anyway the Yogurts, Hummus and some fresh produce items that were sold had expiry dates oeceding the sale date...I then wrote to Woolworths and they sent me a generic response of we will investigate.......its a pity because i buy stuff from the Woolworths food store every week and have been doing so for more than 5 years....I am irritated and disappointed.