customer complaint

I was at Hub Gateway shopping center Yesterday to buy trouser and I bought chocolate, only to find out that they sold me expired chocolate worse i woke up sick today, I went there to tell them and the manager was terrible she didn't treat me right and she didn't care that I was upset with her attitude I was so chocked to be treated like that as a customer as m working with customers everyday the chocolate expired in January but the lady made me feel like a worst foot in the world how she handled the situation, m shaking as we speak besides that I am sick.