If the product isn't of "merchantable quality" you can get out of your contract with them, I did.
I left them with 2 months still on my BB contract, and they canceled it for me because I was really unhappy with the level of service (see all the other BB threads).
You CAN get out of it and if they tell you other wise then you need to speak with someone higher up, after all you shouldn't have to pay for something you can't use