Another ex-Nildrammer here
My Nildram e-mail account, which soldiered on after Pipex, Opal, and Tiscali into TalkTalk never worked properly with the TalkTalk 'customer service' web portal. I had several sites connected up using Nildram, and TalkTalk completely mucked up the account, and I never did get the billing sorted out*. I finally left with TalkTalk owing me money, which I did not chase, regarding myself as lucky to get away without further trouble.
*I had less patience than this fellow: