We've had several reports of a unusual phone calls which claim to be coming from BT. A recorded message tells you that broadband will be disconnected.
A quick on-line search suggests that this is a scam and has nothing to do with BT.
If you respond, then they know there is a real person on the end, and they will recognise you as a possible 'target'., You will get even more calls, so please just hang up, do not speak, or press any buttons.
They will also try to extract personal information from you.
To tell if a call really does come from BT, click here to read the advice on their website.