No wonder people get confused! These rogues conveniently have the intials TPS which makes you think they are part of the Telephone Preference Service. To be fair they do offer a cancellation if you get it in writing to them within 7 days of receiving your pack but then they take off a massive admin fee anyway.
Just a thought but if anyone has an old relative living in council accomodation the best way to get shut of these people when they call is for the tenant to simply say what my wife's 87 year old uncle says - "ring the council it's not my house" He then says thankyou and hangs up. It seems to work a treat for him.
In fact - thinking on that would work for anyone - just say you don't own the house, thankyou and hang up. Chances are they won't ring back as it's easier to move onto the next target.