6 week old expired premium meat

I bought a T-Bone Steak from your signature range at Woodlands Centre on the 8th April 2018 to braai that same evening. The meat was rotten when we opened it and we discovered on the poorly printed label that it had in-fact expired on the 25th of February 2018. We were hosting the braai and had to ask our guests to share their portions of meat with us. We are 4 people that they had to share with. HOW does expired meat from February remain on your shelves?? That is nearly 2 months. This is shocking! The embarrassment you have caused us is inexcusable. We want our money back, we paid a premium price for rotten meat.