Pnp ain't loyal... will kill its customers

I am not happy with an incident that happened. I bought a pkt of grated cheese on the 15th Dec. Got home home and packed it the freezer. On the 20th I took it out only to find an exp date sticker dated 31 Sep 2022.i returned it back to lemon tree pnp. The department manager was called, name tag said Themba. His reaction was disgusting. His exact words were. Why didn't his team members remove the stickers cos they were changing them yesterday. How careless can pnp staff be. Means we buy expired cheese all the time. Pls investigate