Which NS servers should I use?
First, you need to add your domain in the DNS section of the control panel.
After that, you need to enter our NS servers in your domain settings at the registrar:
ns1.vdsina.com
ns2.vdsina.com
ns3.vdsina.com
ns4.vdsina.com
Domain settings can be updated up to 24 hours! This time depends on each particular registrar, as well as on your Internet provider, which can cache old DNS records for a long time.