Poor service & unprofessional

Am writing this complaint letter to a Supervisor who was very rude to my sister in Mthatha. My sister traveled 35kms to buy groceries at spar, then when she got home unpacking groceries the kale was rotten and smelling so bad, when she called them asking why are they selling rotten vegetables the supervisor was so rude to my sister. Am so disappointed and I never put my foot there ever again. The way I support this company when am doing my catering, I repeat never again