Hi Misterbloke,
A warm welcome and thanks for posting on our community forums. We can certainly help with this issue, before we invite you in for a private chat, can we ask if you have had the home switchover completed already?
If you have, did the engineer not advise you that we can arrange additional wiring so that you can still have your landline downstairs if required?
If this is something you would like us to arrange for you, please come back to us so we can assist you further.
Kind regards Jodi.