Rotten swiss roll

<p>I purchased a swiss roll at pick'n pay Senaone yesterday. The sell by date is 13-10-2016. I put it in the fridge as soon as I got home which is like 5 mins away from the store. To my suprise when i was about to eat it, the roll was rotten. How is it possible that the store could just place rotten rolls in their fridges. It makes me wonder how many more people experienced the same disappointment as me from the store. There are so many rolls on the fridge probably all rotten. I will really have to reconsider buy anything from that store ever again. </p>