Replying to Argh, why do people suck at mounting bindings?!

I took my skis to my local shop on thursday and told them to mount them 2cm back from true center, first of all they asked me what I meant by true center, I told them the exact center of the ski, and the tech guy said oh core center.   So I told him to just measure the exact center and put the binding 2 cm back. 
He tells me it will be done on saturday, wtf is that shit?  There was no one else in the store and all he was doing was talking to his boss, such lazy bullshit, and I know he didn't have a ton of work to do because they were watching a movie when I walked in.
So I went in this morning to pick them up and they are mounted behind the recommended line, which is pretty far back.... I told them to remount it where I want, and they said it'd be done in an hour.  What should I do, just ask for it to be free?