Changed to N Power (via Flipper) as they gave me the best deal. Set up the online account stuff using the same email address I use for almost everything, and the same password I use for things that don't much matter. Worked OK. Or rather sometimes.
Got an email from them asking for meter readings. Tried to log in - Firefox had save the login details which had worked before - and it refused. Entered both again - still no luck. Asked for a password re-set. No email arrived to do this.
Used their chat service. They sent me a temporary password which worked so re-set it back to the original. Which now works as before.
Thing is that I used Flipper to get me the best deal, and they've complained they can't access my account either. And they had the same log in details I've used.
Any guesses as to what is going on?