hi there - wonder if someone can help me please?

I changed the DNS of my website on 5 March 2008 from 123-reg to jamroll.net as my new hosts. I've always been really pleased with jamroll, although their support seems very sporadic at present. www.kidsstuffhungerford.co.uk

Nameservers changed almost immediately on Nominet, but I cant get into the website...

WHOIS says that Registration status:
Registration request being processed.

123-Reg wont respond sensibly to my questions, and jamroll say that the registration needs to be complete before i can set up my site, but that's the end of their support..

Who do I need to talk to - jamroll (new hosts) or 123reg (registrars), and what do I need to ask them to do?

I've never had this waste of time problem before..Am tearing my hair out.