Spar expired food

My mother bought roasted buns on the 5th of November, outside the date was the 5th November I mean the sticker they put on, when she got home it was then we saw the buns where rotten with fungus it was unbelievable, as Spar always pride themselves for selling fresh food that was disappointing, I tried to get hold of them on Twitter but they ignored me, i even put took pictures n showed them but they ignored my tweet. This is Cofimvaba Spar @ EC