Spoiled Milk

I bought a 1L sachet milk today and the expire date isn't until the 14th - and now when I wanted to use the milk it was beyond spoiled / sour!<br> <br> It's really hard not to get angry when there are people like me who are unemployed and money is very rare and you buy something and it can't even be used. Most things can't even be taken back to the stores, so you have to face your hungry children that the things you've bought can't be used and there isn't money to buy new ones.<br> <br> Is it fair?