PLASTIC FOUND IN SANDWICH

I had just purchased a sandwich to the value of R45.99 at one of the Engen Woolies (Randburg). To my disgust I though that I had just bitten into a finger nail!! but n fact it was a sharp piece of plastic! This is totally off and better quality control needs to be taken. I have been supporting this Engen for over 5 years. This is enough to put me off Woolies sandwiches forever.