If you are one of the small number of consumers that has broadband from one supplier and telephony from BT on the same ‘line’ then you can’t stay on that arrangement, if you want BT to continue supplying your telephone your broadband from another provider has to stop , if you want to keep your broadband with the other company your BT telephone has to stop.
You can joint BT for telephone and broadband, your broadband supplier may also supply telephony and you could ( if they do ) join them for both ….but you can’t remain as you are , and as you have had ample time to make a choice , and you haven’t, you eventually get to the point where a choice is made for you .
If you want BT to supply telephony and that’s the assumption, but continue to not supply broadband, your broadband from the other company (if it’s on the same line ) will have to end then your current BT telephone will then be converted to a pre digital phone line (to all intents and purposes nothing changes at your house ) the result is you have telephone only on your ‘line’ .
TBH , much like the original post , you have almost certainly misrepresented what the communication actually says ….I doubt it says you have to take BT broadband, it probably says a one way to keep telephone and a broadband service (if keeping broadband is important ) is to take both from BT …..post the entire communication , rather than your take on what it says , and we can be the judge.
