I thought they'd abandoned the Demon emails? It took me several days to go through all the accounts which used it as a login and change it to my new email address. Even so I missed a couple, including my Demon internet account! Hence we ended up still paying Demon for a few months after we'd changed to a new Vodafone package.

Because Vodafone took over Demon and our bills had been paid to Vodafone for some years, we assumed (wrongly as it turned out) that one part of the company knew what the other part was doing.