Hi @rpwithey thanks for your post here, although we're sorry to hear of the concerns you've raised here regarding your landline.
We're afraid you have been misadvised by BT here. To be clear, the landline number must remain completely open with no disconnection scheduled against it in order for us to retain the number.
With this in mind, you will need to discuss cancelling the disconnection with them (at least on the landline side of things) and then we can again request the number from them.
Once the port is completely, the landline (on BT's side) will automatically close down and transfer to us.
Please let us know if you need any further help once you've spoken to BT on this and we can help re-raise the number port request.
Many thanks
Tom_W