The telephone preference service is a godsend
Means they cannot withhold their number, so you always have a contact number to work back from.
(Mensa Reject has gone out, I'll be back on, Thu 27 May 2010, 17:29, 2 replies)

TPS doesn't work for overseas call centres
They're not bound by the rules of the UK's Direct Marketing Association (DMA) who administer the TPS and it's snailmail equivalent the MPS.
You'll certainly drastically reduce the calls you get if you use TPS, but never completely get rid of them.
( Snappyuk gets BIGGER with free sample., Thu 27 May 2010, 18:25, closed)

Indeed you are right there, but since we signed up we've only had about 2 calls in the past 6 months that we couldn't get the number via 1471.
(Mensa Reject has gone out, I'll be back on, Thu 27 May 2010, 18:43, closed)

not true
that service dont work, not with the fuckers, ive tried everything... trust me, these sods are unstoppable!!
(phils1969, Fri 28 May 2010, 13:58, closed)