Normally, this is due to an improperly configured setting in vBulletin, which looking at your site, seems to be. I would engage with vBulletin support for further investigation.
Your request was already addressed and denied due to those accounts not compliant with TOS/AUP
https://community.x10hosting.com/threads/request-for-review-and-permission-for-multiple-accounts.216965/#post-1007087
There will not be an exception as the policy defined in terms of service stipulate one account per person. I have forwarded this over to an admin to further review.
Going forward you can add the domains to your existing service as the free plan allows for 3 total domains to be associated with...
Please follow unsuspension request guidelines. The suspension reason is listed in your account panel https://x10hosting.com/panel
https://community.x10hosting.com/threads/this-board-is-for-all-unsuspension-request.209292/
Please follow unsuspension request guidelines. The suspension reason is directly listed in your account panel https://x10hosting.com/panel
https://community.x10hosting.com/threads/this-board-is-for-all-unsuspension-request.209292/
If you know your direct login credentials for the hosting control panel, that password should be the same for FTP.
If not, https://community.x10hosting.com/threads/x13-sso-login-issues.216919/ has instructions for changing that password.