The nameservers of your domain name can only be configured with your domain name provider. The WHOIS information shows the registrar being Key-Systems, but they are a wholesale provider, so I’m guessing that this webspacekit.com company whose nameservers your domain is pointing to right now is your domain name provider.
This is our guide on how to update the nameservers of your domain name, but it’s not tailored to your domain name provider. If you’re not sure how to configure your nameservers with your domain name provider, please contact your domain name provider for help.