Phones still off. Grrr. BT

Phones still off. Grrr.
BT have said that I may see an engineer today. I’m not sure I like the fact that the engineer may be here. I’m not best impressed.
Neighbours have had their analogue residential line phones fixed already. But my business critical and more expensive digital line has still not been repaired, with no definite time scheduled for an engineer to call.
As you might imagine, I’m not best pleased. But as BT have a local monopoly at the moment, with no cable provision in this area, what can I do?