Pick n Pay helath hazard

I have just bought bananas at Pick n Pay malburton and found 1 have blood inside.I went back inside the store and spoke with the manager by the name of Christy.I asked her to have the banana tested but she was so rude and told me to get a refund if I dont want them . Even after showing her the banana she refused to assist and said i can have it tested myself it is concerning as it is a health risk for consumers.