Car service with no feedback

In the four years or so that I have taken my car for it's usual service, my car has never been washed. With the milage service I asked to look specifically for a noise in engine. I received no feedback not even on paper or verbally when I collected my vehicle. The noise is still there. Every time I have taken my car for a service, I find loose boxes, tools, papers etc lying on the floor of the car or on the seat or in the boot. The empty boxes are either oil or such that was probably used for my vehicle. Tools I will just keep. If they don't care, why should I?