Tuesday 26 June 2007 8.20am
Register with the TPS www.tps.org.uk and you might get the calls to stop (this generally takes about three months)... however, if they do continue you will have to report them and it's a bit of a fiddly process.
Data protection is very woolly on text messages at the moment. Officially they're 'opt in' but there's nothing legal in place to implement this that well (as far as I know, although legislation is changing a lot at the moment).
However, opting out of a particular company's marketing can take a bit longer than a week or so, and although I'd totally go and complain again, be ready for them to say 'it will take x weeks/months for us to take your details off our system'...