Mc donalds brackenhurst alberton

I bought a grand spicey chicken burger. When I opened the box there was tomato sauce all over the inside of the box (the burger doesnt even come with tomato sauce on it) and under the the burger was 2 used tomato sauce sachets. This is disgusting and i will take this further as this is unacceptable and I don't know who did what to the burger and the box