I got 3 emails last night, the 1st two said I had successfully changed my password the 3rd said I had successfully changed my security details. I didn't, someone else has, and now I can't get logged in, and my security question, last bill date and bill amount don't work either. So far I've established that my user name is unchanged as it still found me at that point, but no further security details worked.
Re: My security details hacked - unable to sign in
Welcome to the community, I'm so sorry to hear you can't access your accounts.
We'll need to clear data protection checks with you to be able to check everything and make any changes, I'll send you a PM so we can get all the relevant info. You'll find this by clicking on the purple envelope, in the top right of the screen.