Request to remove my domain from a terminated service.

Hello, due to travel I was unable to access my control panel and the service was "Terminated". I tried creating another service and redoing everything, but when creating the service and specifying my domain, I receive an error message saying that another user is using the specified domain! Would it be possible to remove the domain "LABEXTRAD.NET.BR" from the terminated service so that I can create a new service? Thank you in advance and sorry for the inconvenience!