transfer domain name from wordpress.com

Hi there, apologies first of all but I am quite new to word press. In my haste to develop my site I 1st registered a wordpress.com blog after which i bought a domain through wordpress with the same name as my blog to give it a more professional feel.

I then realized that I needed a www.remarpro.com installation on my host to customize my themes the way I wanted them so went ahead and installed it on my host with my domain name.

I now have issues trying to log into that account as everytime I do using the username & password for my www.remarpro.com installation, I am still directed to the wordpress.com version.

Once again apologies for this trivial question but I would really appreciate been pointed in the right direction.