It is just as you suggest Jamie, all cold canvassing of 1 sort or another, they can NEVER go back to a customer, as they bait and switch, so once been never to return.
Don't think they do Ian, by the time anyone gets to them, the list of other complaints is larger, remember Trading Standards have about a warehouse sized file on these "artists" at the moment, but somehow they keep working.
~Where are you Jamie? as they have probably moved from the south coast area now, they were getting well known down here.