Woolworths sold me expired crisps

<p>I bought crisps yesterday at Woolworths Southgate and didnt realise that they had expired over two months ago. I ate the crisps and thought they tasted funny and stale but I still didnt know why,i could not ven taste the salt and vinegar flavour but i thought maybe they are supposed to taste that way because I had never tasted them before.I had an upset tummy after eating them and thought maybe it might have been something else I ate.This morning I decided to look at the tin,which i still have an it turns out the expiry date was 12/04/2016.How could they be so careless? This is food and eating expired food is dangerous!</p>