Unacceptable shelf life of yoghurt

I would like to bring to your attention the fact that Woolworths Yoghurt has a 2 day shelf life which is most unacceptable. I purchased a yoghurt over a weekend in June and opened it on the Same Tuesday, only to find that it was off. After investigation I found that the sell by date and use by date was only 2 days apart. Who consumes a kg of yoghurt in 2 days? I have looked at other brands of yoghurt and they offer a months shelf life which is more acceptable. This has now made me aware when shopping in Woolworths that I will definitely have to check the shelf life of products.