Parmalat - Everfresh - You Lie!

I bought 5 boxes of (6x1l) Parmalat everfresh milk. The last two boxes are sour. The first couple of litres, I just threw out, not taking it that serious. I called the complaints line to inform them of this and am being told that they can only log a complaint for the litres I have left in my posession. They even have the audacity to tell me that I should have taken pictures of all the sour boxes as proof of this. My point is, if I wanted a full refund, I would have kept all the boxes, but my call was just to inform them to have a look at their processes. But after the arrogance and attitude of the agents, I am now livid. I went out of my way to inform them of their inferior product, and get treated like I am a ****. Never again will I buy their product.