Pizza went bad

I’m very angry we bought a Crammed Decker at debonair Pizza at Chris Hani Mall at about 18:26pm only to found out it went bad. They didn’t give my mother the receipt which make things even worse because it tells that they knew that the pizza went bad. The only thing that we know it’s the order no which is 462. I want my money back because this could have resulted in us be sick and I couldn’t even finish it and I still have those spoiled slices as proof. Debonairs Pizza I want my money now.