You have received the guidance that would be given to someone building a new house. Surely the cable, is still visible in your cellar? All they have to do is reconnect it in the road. I suggest you ring EDF, and ask for the person's supervisor, until you get through to someone sensible.

You may have to get your house's wiring checked and certified okay by an electrician, as they are reluctant to connect unless you fax them a copy of the certificate.