Wimpy Mall@Reds sold us rotten chicken

Went to Wimpy Mall@Reds at 17:35 to buy supper. When we got there, everything was packed up and we asked if they could still assist with orders. We ordered 2 x Chicken quarters with Chips. We were told to wait aside. After a few minutes we were given our meals sealed. We didn't think of opening the package to taste our food. Drove home and as we took the first bite of the chicken we realised that the chicken is off. It has a very bad smell. The chicken is rotten. How do we drive back as they close at 18:00. We can keep meat till tomorrow but obviously they will say we left it over night.We put back the chicken in their package It's terrible service as we paid for the meals and we normally buy from that wimpy and it's the first time we have such terrible experience.