Sour about Milk

I am so sick of opening milk that has turned sour before the predicted expiry date on the bottle. This is the second time this week that I have purchased milk on the way home in the afternoon. Only to open the milk in the evening to see it is turned sour! There I am, sour milk, shop is closed and also no milk for the morning!!!!!!!!!! Guys, lets be honest, your milk is no longer the quality it was. Go back to the original ways you did things and maybe my family will buy your products again some day............... This is not just about a bottle of milk, its about the inconvenience and all that goes around this bottle of milk.