I have several domains bought through the same registrar. They are all set to our own nameservers hosted on our own dedicated server. We are now moving our dedicated server to another company, so we have set up new nameservers on that server and are going to migrate domains over one by one.
BUT, when I try to change the nameservers on any of our .com domains via the registrar's control panel, we receive the error "Nameserver doesn't exist in the registry". Their help pages state that you need to contact their support to "request the name server be registered for all registrars". Other posts on here seem to agree with this e.g. http://www.experts-exchange.com/Networking/ISPs_Hosting/Q_21768190.html
I have been emailing and phoning the registrar all week but cannot get them to reply to any email or pick up the phone! I can't seem to proceed with moving domains over until these nameservers are registered. Is there any other way I can do it without going via our registrar?