Worms found in g***** sold on special

I baught g***** that were marked down, as far as I know companies are not allowed to sell expired goods as this can cause food poisoning. Halfway through my g*****, I notices worms on the g*****. Is this really acceptable? If I get sick from this I will sue the entire Pick 'n Pay group as I have previously complained against this branch and nothing has been done to ensure the hygiene of the place is kept under control. Butchery rots so bad you can smell it two isles away some days, chicken is sold raw with blood dripping, and now worms in the fruits? Seriously? You should definately do something about this! Or I will get a health i spector to visit this branch! And please keep in mind that I do not want any feedback from the store, but rather from head office, because if an owner tells me to my face again I am talking ******** I am definTely going to loose my temper!