Dollar General review: managers actions

I took NEW friskies pate cat food 10/6$ to trade to friskies gravy cat food. Was told on front of several customers, this date food wS discontinued last year so therefore "I MUST HAVE GOTTEN IT OUT OF THEIR TRASH, " I am a regular customer and have never gotten food out if trash. It was so embarrassing to be spoken to like this in front of other customers...SOMEONE NEEDS TO CALL ME ASAP