Goods not in take away bag!!!

I go through the drive through at KFC and then they forget to put some stuff i paid for inside of the take away bag, i end up driving back and have to explain that something was missing from my bag, tonight was the 7th time this happened in the last six months and I am getting sick and tired of driving back to get what i paid for, its bad business and Im starting to think its done on purpose. Honestly im at the point where i rather go buy food from a different place