We keep getting calls from these people at our office.  We have asked these people several times to quit calling, as we are not interested in whatever it is they are selling or promoting.  They just keep calling.  The next time they call, I am just going to put them on hold indefinitely to waste some of their time, just as they have been wasting our time.  

Indiana has a do not call list for residences; we need one of those laws for businesses, so that we can get on with our work!