alexman - I'm sorry to hear this and it's a typical strory from these places, but you were warned by a couple of people :thumbsdown:
You're lucky you got away without any damage to the car from grit in leathers, etc. I doubt they crap they have applied will do any harm, just attract dust with stickiness.
You now have to undo the work they did by having it all cleaned off and rebuilt back through to a good finish inside and outside (Probably wash, clay, polish and then wax.
I suggest you open a specific post on the detailing section, where the specialist will pick up the thread and chip in.