glass in food checkers sea point

I work in the sea point area use checkers daily.was so disgusted bought a piece of chicken only to find a large piece of thin flat glass in it...what if I had given it to my child that would not have spotted it...as a daily user I will never buy any food at checkers sea point again.most horrible service as well when taking in back they just looked shocked and gave my money back.the branch manager saw the glass asked what was going on and walked away..really what happed to customer service just the thought of it makes me feel sick.never again checkers sea point...