Breadtop

I ordered a chestnut birthday cake for my son's birthday in late January. However, when we ate the cake last night and found the cake tasted slightly sour. It was from the chestnut puree and we think that the cake is spoiled. My son ate a quarter of cake before we found out. He got slightly food poisoning and got diarrheas at night and on the next day. I returned the cake to Breadtop in Hornsby Westfield. The salesperson didn't refund to me and she said she needed to communicate with the production line and find out the issue.