May I ask you to look out for the Welcome Email delivered at your primary email address on the file with us. Grab the nameservers mentioned in it and apply those for your domain/s.
You can contact to existing domain registrar and ask them to update the Name Servers of the domain or if you have domain control panel details, you can update Name Servers by logging into it as well
Hi Louise,
Seems that you have managed to update nameservers for your domain name.
Please let us know if you need any help or more information.
Enjoy your stay