Charging and not delivering...

This afternoon I stopped past the drive through for two cone ice-creams. I specifically requested that they each have a flake in. I was billed and charged accordingly. I then proceeded to the collection window where I took hold of my ice-creams and drove off. Only to later realize that they hadn't put the flakes in. I checked my slipped and I was charged for them, so why were they not in my cones? I feel as though because this branch deals with a number of students that my previous complaints haven't been taken seriously. I am still a paying customer and should therefore be treated as such.