Your account was more than likely deleted in March, during a pruning of inactive accounts. Your last login was in December. In January it was eligible for suspension and then by February it was eligible for deletion. It was deleted in March, then x10 started restoring users under a one-time-only policy because reminder emails were disrupted during the transition. That ended a few weeks ago. If your account is restored, please don't rely on emails as they can be sent to the spam folder or even blocked. The login requirement is once every 30 days (not once a month). Only logins to
https://x10hosting.com/sso/main count. FTP and forum logins do not count.
Since your DNS was wrong, your site changes went to the old server (xo#) instead of your new server (x15). Please update your DNS to 198.91.81.15 (x15.x10hosting.com)
I'm asking an admin to see if they can restore your account even though the restore timeframe has ended.