Beware rotten meat at Pick N Pay Epson Downs

I bought some Pork from Pick N Pay Epson Downs and on noticing (two days later when we wanted to cook it) that it was rotten, i decided to take it back so as to get a fresh pack. The manager on duty at the time was very rude and on explaining what had transpired, he went on to imply that the electricity at my house went off and thus the meat got rotten. He also advised that the meat had gone past its sell by date and therefore he would have been doing me a favour therefore he was not going to assist me.