Thanks for the response.
I've been given this advice before - and I also finally got a wordpress response which said:
"Your domain's name servers are still pointing to Yahoo. Can you please contact your domain registrar and have them update your name servers to point to WordPress.com, as described here:
http://en.support.wordpress.com/domain-mapping/map-existing-domain/#instructions-for-mapping-an-existing-domain
But nowhere do I find an indication of what is my domain register. It's wordpress, isn't it? I never separately contacted any register - just signed up with wordpress. I can't see anywhere where the place is that I can contact them (or whoever I am meant to contact) and ask them to update my name server.
The instructions say:
"You can usually change your domain’s name servers at your registrar’s website, but the process is different for each domain registrar. Instructions for popular registrars are available here— if your registrar isn’t listed, visit their website or contact their support team for assistance.When a new domain is purchased or when name servers are updated, it can take some time for the change to take full effect (up to 72 hours, but normally much less)."
WHAT DO I DO IF I CAN'T FIND MY DOMAIN REGISTER? I'm sure this shows me up as clueless but I simply don't know this and can't see what to do. I don't think the instructions are very good for novices such as me. Anyone's help is appreciated as this is a problem that's gone on for a couple of weeks now and meanwhile my website is completely hidden.