Bad goods received

It is with sadness to be writing the report with a store that i use for my monthly grocery shopping, on the 6th June i went to supa store in soweto dlamini to buy my groceries as per the norm, one of the items bought was beef liver, when i got home later on the day i made the liver only to find out that it was off, i then went to the store the next day, 07th June to report the matter, unfortunately i was not assisted, the lady i found Gugu told me that they need me to bring the liver as proof that the liver was off, i explained that i do not have and that i stay 35km away from the store so it is impossible for me to drive back just to get that liver, she then went and called a guy, whom i suspect is the manager at the butchery (Jabu) who told me there is nothing he can do without the liver as they have to return it to the supplier and clients are "******" they like returning things, he then called another guy (Brian) who im not sure of his rank who did not even bother to come down to listen to my story and just dismissed everything, i am not happy with the service received at all, i had more than 20 items on my slip, if i was a ***** as they say why would i be complaining with the cheapest item not the most expensive ones, again if it was impossible to return without the liver why did they keep calling people to confirm as it was clearly explained in the policy? i feel it was possible for me to be refunded however they just did not want to do it. i do not need a lot i just need my money or fresh liver, Thank you