The nameservers to use will be shown in your Control Panel they will be 2 of the following

ns1.kiwihosting.net.nz

ns2.kiwihosting.net.nz

ns3.kiwihosting.net.nz

ns4.kiwihosting.net.nz

ns5.kiwihosting.net.nz

ns6.kiwihosting.net.nz

Alternatively your control panel may show them as

ns1.kiwihosting.net

ns2.kiwihosting.net

ns3.kiwihosting.net

ns4.kiwihosting.net

ns5.kiwihosting.net

ns6.kiwihosting.net