I've had a similar issue - my broadband was activated on the 13th July. I waited 14 days and it made no difference, so I logged a complaint online but heard nothing for over two weeks.
So, you could email them, or phone BT. The first call I got back wasn't very helpful, I had to escalate the complaint to get another call back and was promised a resolution (that I'm still waiting for). Hope you can get it sorted!
