Expired pie

I bought a pie at the garage total risegate Southgate phoenix kwa zulu natal and after taking a bite I noticed it was abit sour and when I returned it back they just shoved me with my money back..when I reported to the manage he said it's not they fault because they just selling pies and they don't taste them which was so rude and said I should report the case he doesn't gkve a damn incident took place on the 21/12/2017 at around about 6ham