Log into crazydomains.com and click domains
Click on the domain to edit
Scroll down to Naming Server (DNS) and hover to see modify- click Modify
Change the current DNS names to these names and click update
Nameserver 1: dns1.supremepanel.com
Nameserver 2: dns2.supremepanel.com
Once updated these should only be 2 DNS addresses, if others exist, delete them