go in, take some pictures or maybe cellphone video, and expose them.

only do this if you know what you are doing. basically you need to make sure there wont be legal consequences. but if it works out, its really satisfying.

otherwise, just complain at different levels. complain locally, if they have a support line call there to get an email adress or something, then later call again to complain, and then complain in email to the higher-level management where you can get an email adress somewhere. be very specific.

tell the truth, dont exagerrate, and then you should be safe from consequences if you do name and shame them.