Slack service.. food missing from order, consistently

Twice now in a week and a half.. i have had the experience of leaving the drive-through and getting home.. to discover that my order has an item missing. The one day, i drove back immediately.. it was a return trip that took me 20 minutes. It was someone's twister. Thankfully the person at the KFC (17th Quarter) remembered me and assisted me. Second time, it was at the KFC at 5 ways in Port Elizabeth... Pops and chips for a little girl. I didn't have the energy to go back and collect it or demand it .. i just wait to raise the shocking service I have consistently received and from two different branches...This is theft by the way. Taking our cash and not giving us the food. I had to tell a little girl she couldn't get her pops and you are richer for it.