Sounds very much like Kirby cleaners. Don't believe them.
Our next door neighbour practiced on us once. Yes, at least 2 hours talk and they clean a patch of the carpet, a square by the door or something, just to show you how it works. If you want the rest of the carpet done you have to do it yourself, and will probably buy one of their cleaners !
Don't let the buggers in.
Feel sorry for the kids that take these jobs on, but when interviewed they are not told much about the job or even which company it is for. Based in Birkenhead.
...and those who were seen dancing were thought to be insane by those who could not hear the music.FN