Let's get this straight:
now with no broadband at all since last week
So you had a BB connection from EE until last week and then it stopped?
Do you have a dial tone on phone from test socket with router disconnected?
What does it say in the top section of the initial Status page of BrightBox? Omit your Username.
What does the System Logs say?
1999: Freeserve 48K Dial-Up => 2005: Wanadoo 1 Meg BB => 2007: Orange 2 Meg BB => 2008: Orange 8 Meg LLU => 2010: Orange 16 Meg LLU => 2011: Orange 20 Meg WBC