You can change the nameservers of your domain by yourself. Just follow the instructions:

Step 1: Go to https://clients.ezzytech.com/clientarea.php and login to your client area to manage your new domain.

Step 2: Whenever you are logged in, click on Domains -> My Domains.

Step 3: In "My Domains" panel click on the "Manage Domain" button just beside your domain name for which you want to change the nameservers.

Step 4: Click on the Nameservers tab, apply the nameservers which you want to set for your domain > Click on Change Nameservers to apply the changes.