Sour milk disgusted

<p>I bought 2 6 packs carton of milk a week ago, the expiry date 17/07/2017, thus far 7 of the cartons I opened was sour!!!!!!! I am very disgusted with this product!!! this should be banned from the shops!!!!! milk is expensive and my money went down the toilet not to mention my petrol I used to go purchase this at the store, I am horrified and angry and I guess the manufacturer is not going to comment on this either!!! pathetic!!! </p>