GAME SOLD CHICKEN THAT WAS PAST THE USE BY DATE!! BAD customer service!!!!!!

On Friday 06 September 2019 my fiance and myself went to Game Tygervalley Mall to buy a few items, we bought the Rainbow Simply Chicken Steaklets (buy for R100 special). On Sunday 08 September 2019 we decided to eat the steaklets, after preparing and eating what we thought would be a delicious meal, my fiance pointed out that the chicken doesnt taste as it should, I immediately checked the packaging for the "use by date" and noticed that the date was 27/06/2019!!!! we were eating chicken that was well past it's use by date! We immediately contacted Game and were told that there was no manager on duty that would be able to assist us, we then contacted Game customer Care and were told that someone will be in contact with us on Monday 10/09/2019 - needless to say, nobody contacted us, my fiance called Game on Monday afternoon and was told that he must bring his slip and the chicken and they will assist him. My fiance went to Game yesterday, the manager wasnt very helpful and basically made my fiance feel like he is the one in the wrong, he is the one that is trying to **** Game by bringing back old food, the manager told him that its almost impossible between his staff and the suppliers staff to have made such a mistake! They gave my fiance a voucher for R34.00 (Refund). No Sorry, No consequences towards Game!! We are very unhappy with the way Game had treated this entire situation and the fact that all they did was give us a refund!! Had children or elderly people eaten that food, their health would've taken a knock, luckily we only took one bite each and noticed that the food wasnt tasting as it should. I honestly feel like Game did NOTHING to prevent future incidences like this happening again, I feel like they have taken absolutely no responsibility and the refund was not worth the expenses we incurred due to the food being spoiled, please can somebody tell me how I can report this issue to somebody willing to look into it and willing to do something about this issue?? What does the law say about selling MEAT Products AFTER the USE BY DATE??