BG Geo smart meter no longer showing readings

When I left BG, my Geo smart meter was still able to display energy used and my meter readings. It’s been like that for a good few months.
Now it’s decided to blank on me and only show Connecting to smart meter.
No doubt BG have removed the SM from their system completely, but is there anyway to get the IHD connected again. I have done the normal hard and soft restarts, e.g. leaving unpowered for a week to see if it reconnects.
Cheers