What does it say when you login to https://x10hosting.com/panel
Please refer to https://community.x10hosting.com/threads/this-board-is-for-all-unsuspension-request.209292/ for guidelines on making an unsuspension request.
As the error message informs you, you have been temporarily blocked for 24 hours for too many failed login attempts. You must wait 24 hours and either try again or go through the process to reset your password.
Multiple Accounts detected. Multi Account unblock requests are currently on hold to address the current batch of requests.
https://community.x10hosting.com/threads/multi-account-unblock-requests.209963/
I think might be confusing the subdomain side of it (which is only 2 allowed) and the main domains (which 3 are allowed) and checking the wrong location for it. Account Manager > Domain Setup.
Only 1 domain pointer is allowed on the account.
Please include details from the account panel https://x10hosting.com/panel which will show why it is suspended along with the reason you believe it should be unsuspended.