Urgent DNS & WHOIS Repair

My domains have stopped resolving entirely—every lookup fails—so I know I’m dealing with a “DNS not resolving” issue. The nameserver entries at the registrar are wrong, and I need someone who can jump in right away, correct the DNS records, and tidy up the public WHOIS information so it all matches... (Budget: $30 - $250 USD, Jobs: DNS, Linux, Network Administration, Network Security, PHP, Web Hosting)