So the problem is with your name servers. They are currently pointed towards:
But they need to point towards:
To do that, you'll need to log into your domain registrar and generally there's some way to look at your domain settings; you need to change the name servers. This is typically very easy to do. It looks like your registrar is Afrihost.com, if that's any help, and the technical contact there is at: [email redacted]
Once you do that, your site should become available, as everything is correctly set on the WordPress side.
Just let me know if you have any additional questions!