expiry date and bad attitude

Ordered my food @13:12 (1 soul sister and a can of coke). went back to eat at work, when i had my first bite on the chicken it was Greenish in color. went back to chicken licken to ask if they can just replace it , they told me i had to wait for the manager. waited for about 15 minutes. when he came back i had to explain myself. and he had the nerve to ask me if im allegic to the chicken and the question was irrelevent. i told him i olny want a replacement. he never apologies, he gave me attitude. my lunch our was ruined.