To update the name servers of a domain registered with us, you first need to log into your client area.
If you do not know how to access your client area, you can find out here.
First, you need to access your My Domains section, either by clicking on the Domains section in the center of the screen of your home page, or by selecting My Domains from the Domains menu on the upper menu bar.
Select the domain you wish to edit (click anywhere on the bar except for the domain name, that will bring you to the website).
You should now be at the domain management page.
Click on Nameservers in the Manage menu on the left-hand side
On the next screen, you may enter your new name servers or you may choose to use our default name servers.
Make sure you click on Change Nameservers to save your changes.
Please note These changes may take up to 24 hours to fully propagate.