Pick n pay selling expired goods

I think someone from the head office should contact me regarding compensation, because at present i am seeking legal aid to take this matter to court. I have had many queries with the store in question but nothing ever changes. I once overheard staff having a private discussion and didnt see me or just didnt care and they said that that branch has a bigger mark up on some things compared to other stores and they said they would rather shop at shoprite east gate or pick n pay bedford center, but ive never said anything regarding that nor can i prove it, but theres a lot of things that have happened at this specific store.. If you had to look at the history that i have had .. From buying chicken that went off within a day of buying it, bones in borewors and mince meat (which is resolved) and now this .. I was sick all night and on the toilet most of the day.. i want compensation this time.