I wrote an e-mail to #nordvpn to ask them to detele my account and they ignore my request. They only responded to a brief mention of the fact that I wasn't notified via e-mail about this hack, but ignored the clearly requested account deletion. I will persevere.
@blacklight447 I had a reply from another colleague who was OK, confirmed my identity and deleted my account. They have too much info on customers and too many obstacles, not a healthy service.