I'm also with ADSL24 and they are great. That must be pretty fustrating, but it's just some kind of technical IT bug, don't let this ruin your expectations of them.
They are a very good isp and do have great support, maybe if you just talk to them properly I'm sure they can do something about it.
It seems their automated Email system is bugged (had an incorrect email last week), but that is all that is at fault here.
They may well be a good ISP once you actually get it up and running, but any company that thinks it's ok to force someone to take a day off and sit around for 5 hours twiddling their thumbs for something they've been promised, only to find that it was all a waste of time. doesn't strike me as particularly good customer service!
Then as an added insult to injury, to be told that I wouldn't be charged for the days between the 18th - 24th, as if it were some kind of compensation, just made my jaw drop.
Then the fact that when I asked to speak to a manager about compensation or cancellation I was told that "there isn't one here". Umm... What kind of company runs a customer services department with no manager in the middle of a working day!?