Always happy to help 😁 and point out VM's published info which says it should all be free of charge, especially for any older customers who might not be aware, or worried about it or unable to afford to buy new cordless phones etc. etc.!
Just so you know...
We’re switching your home phone service over to our fibre network from the traditional telephone line at no extra cost.
and
You’ll need to book a free technician visit if:
You’ve got connected devices such as a burglar alarm linked to a control centre, use a telecare device, or have other phones connected to extension sockets. You’ll need to contact your provider and let them know about the switch if you have any of these to make sure they’re compatible with a fibre service
Your Hub and phone can’t be placed near each other