Bait advertising

Pick n Pay advertised long life milk over the weekend. i went to Pick n Pay Phoenix on Saturday 21 September 2019 to purchase this milk and saw that the expiry date was the 3 October 2019. When i spoke to the Manager there i was told that they bought this batch and this was the date on it. i told him this was bait advertising as this is supposed to be long life milk and it expires in a week. He told me there was nothing he could do. I took the time to go there to get this milk just to find that i have one week to use six 1lt milks. If you do need further information i have a picture of the box with the date. it is the numel milk box of 6