Thanks again for all your replies.
the fact is that I can get in to dthorpe.net on ftp and cpanel any time I like (and do) with the setup as is. I'ts my other domains that have gone.
Plus, everything works for my clients via www and browser. Could this be so if the dns is wrong? Yes, it does work after 'reload' too. If I alter it and that's wrong, then my clients lose their web sites, presumably.
Jim himself moved me to the servers shown and I cannot believe that he'd change my dns settings without telling me. That would make Microsoft look democratic
I'll do another ticket but I've lost one client already, so I guess I need a better company than this one. Shame, it was good once but I doubt that Jim even reads the forums any more.
I wonder if I'll manage to get any money bacK? It took me a month to get a reply asking how much I needed to pay to renew my space! I'll keep you informed but I have a sad feeling that this company won't be around much longer