Pick N' Pay sold me rotten chicken!

I bought a full grilled BBQ chicken at the Brixton Pick N' Pay to find that it was spoilt/rotten when I got home. I called the Pick N' Pay customer helpline to report this and was given a reference number ( ********** 176). I was then instructed to go to any Pick N' Pay with the slip and this reference number, and my chicken would be replaced. Today I paid a cab to take me to the Pick N' Pay in Maponya Mall, and when I informed them about this, I was told that I'd have to go back to the Brixton branch as they are the ones that should be responsible for this. Now my cab fare already exceeds the value of the item. Am I now expected to go there and complain about this again? This is not fair. Pick N' Pay claims to pride itself with selling quality and fresh meat. More importantly, it prides itself at providing impeccable service to it's customers. I wouldn't call this treatment impeccable at all. Would you?