Telegen originaly tried calling from this number, then they started using another of their numbers - 01273341404.
I called 01273341404 last week (13 Mar 2008) and went through the menu options to remove my number from their list, and wow! I've not been called since.
Either it works or they got bored!
I would happily support a campaign to have this company closed down. Their persistance of calling (twice a day for a week) is well within my definitiaon of a nusiance.
I've already lodged a compliaint with OfCom, the more of us that do the more likely things will eventually change.
http://www.ofcom.org.uk/complain/Sadly the OfCom rules appear to be designed to stop silent calls, not persistant unanswered calls.
On the upside they do require the company to remove a number from the list without be marketed to.
http://www.ofcom.org.uk/media/mofaq/telecoms/silentfaqs/