I got yelled at by a customer because yoplait light yogurt didn't have any cherries or any flavor…

I got yelled at by a customer because yoplait light yogurt didn't have any cherries or any flavor and she bought it two different times. I didn't think she was serious, but she was very deadly serious and I debated in my head on telling her if your not happy with it why don't you try a different brand? But I decided not to and just let her have the ones she got free of charge... I just really wanted her out of my lane because I wanted to either cry or just walk away and laugh and cry...