Disgusting behaviour

Yesterday went to McDonalds Roodepoort (Cnr Ontdekkers & CR Swart Drive) and Ordered 2 Happy Meals for my 2 boys. While waiting for the order I could see how one of the kitchen staff ate chips from the food that was ordered. If it was my order or another customer can't say for sure but I immediately asked who is the manager and he was right there and I told him what happened. All I was told is sorry, i then said I want to speak to this person myself and when he eventually came to the front where I was waiting he said he never ate any of the chips. I told him I did see him and then all he said is sorry and walked off. I am disgusted by this behaviour of your staff, how can they eat chips and what ever else from what a customer ordered?? I know the name of this person, you more than welcome to get this from me but that I am disgusted and not happy whith what transpired to put it mildly. The worst part is both the manager and this person did not think its a big deal and sorry was good enough. I am sorry, this disgusting behaviour I won't tolerate, I want to know what is going to be done about this as it is totally unacceptable for any of your staff to eat from a paid order and then want to sell that a customer. I await urgent feedback regarding this matter.