Step 1: Log in to your account through the link https://my.crystalhost.co.ke/clientarea.php
Step 2: Click on Domains
Step 3: Against the respective domain name, click on the drop-down arrow next to the Settings Icon
Step 4: Click on Manage Nameservers
Step 5: Delete all the existing nameservers
Step 6: Enter the new nameservers then click on Change Nameservers