It has in the past taken us up tp 4 weeks and 5 BT engineer visits to sort out a problem.
My advice is keep pushing and br patient!
I'm having this at the moment - getting regular dropouts on my home connection, which last until I raise a support call with Pipex, who prod BT, who fiddle with it. The problem goes away, but a few days later it's back.
Still, by the sounds of it I only have one week and one visit to go...
