Packet found inside birthday cake bought from Al Saudi in Benoni

Bought cakes from Al Saudi Bakery in Actonville, Benoni only to find a packet inside the cake while cutting it in front of an audience since it was a birthday cake. Al Saudi used to make the best cakes but the quality has since dropped. Contacted them and they said they would replace and the owner said sorry but he was too busy to meet when I went to the store. Very bad service and did not respond to messages.