Thanks for advice, but I call them 7 (SEVEN!) times already. I call Bristol, London, Manchester and Edinburgh of course as well. But they were never able to help as they don't know why account is disabled and how to recover it. If I can get contact to any relevant department, where I can speak to someone who actually knows what's going on and how to fix it, it would be appreciated.
I can't go to Extranet as I can't login into my account - it was disabled. I create this post under another account I created. I also haven't any property ID.