Spoiled food

We bought food from The Vredenburg branch of KFC ,South Africa on 25th of August @ 9h00 Sunday morning . When we removed the food from the wrapping and found all the food very dry and tasteless. After a few hours My wife and I ,both, started having severe stomach cramps and starting feeling sick ,which lasted the rest of the day. We suspect that the food may have been "left over" food from the previous day. This is not the first time we had this bad experience and the previous case was also on a Sunday morning. Is it normal practice to supply customers left over food of the previous day? ..because our food were definitely not fresh. We have logged a complaint on KFC website but have not received any feedback to date.