Trainee manager with an attitude

I went there someday to buy a salad dressing and I figured it's ok since I always use it I got rid of the receipt and didn't open it to use right away.a week later I'm making myself a salad and I open the bottle and it tastes off and I thought it's because I have eaten it too much.then my neighbour saw me throw away my salad and he asked why.i told him the salad dressing tastes off,he urged me to check the expiry date and it's had expired 2 weeks prior to my purchase.so I went to the store figure I should ask for management and complain.i found the front desk controller who was helpful.on my way to show her where I got the dressing we found some more on the shelf.the supervisor suggested a refund and apologised hugely but funny thong the manager didn't seem bothered that they sold me and maybe more other people rotten food.didnt talk to me or even try to apologise.all was well until I saw that guys attitude it stinks.it all happened in Checkers design quarter