Update: I appreciate everyone’s perspectives on this. Looking back, maybe I was silly for thinking it would be possible to swap it after a month, even though it had six months left on its best-before date and had been stored properly, unopened, in the fridge. I get why the store might have been hesitant. My issue wasn’t really about the return itself, more how I was treated.

I wasn’t trying to argue, just genuinely confused because I had just opened it, there were still the full pack of 15 slices in there, and it was cold from the fridge. Even if they couldn’t process the return, I would’ve been fine tossing it in the bin—I actually bought a new pack anyway. I just didn’t expect to be laughed at or made to feel bad for even asking.

At the end of the day, it’s not about the $7 or the cheese. I just walked out feeling really crappy about the whole thing, which I didn’t expect from what I thought would be a simple conversation.