When I signed up for broadband I had to take TV and phone as well. Later, when it was allowed, I ditched the TV and phone, leaving just the broadband thru the STB. To do this, they simply reconfigured my box. However, they still left me with channels 1 thru 7 - for free
Later, when my STB failed, Bill C came round and swapped it for a cable modem so no more free TV - but then we have'nt got a telly either!