Selling chicken that is off

I bought a full chicken from Checkers Southgate. It seems as if they don't cook their chickens properly and you find that they are raw. I hd a running tummy for 2 full days due to consumption of this chicken. There was a time I had to dispose one of the chickens I bought 6 days later after purchasing. It seems as if thru are selling chickens that have been on the shelves for more than a week. The chickens are cold when you take them off the shelves which suggest they are trying to keep them cool so they don't go off. This may lead to food positioning and I think I will have in my right to take this to the consumer