Problem with WordPress

Hello, I have made a mess of my wordpress site and now I cant get it back. What I wanted to do was move it from my domain ninamarika.co.uk to a sub directory ninamarika.co.uk/blog but this didnt seem to work. I was running it on ninamarika.co.uk/old-site/wordpress for a short time whilst my site was being re built. Now my new site is up and running I tried to update to 4.1 first of all and that didnt work and everything seemed to not be working correctly anymore. So i accessed my ftp and cut the wordpress directory out of the ftp and placed on my desktop, with a view to being able to put it back if the next step didnt work. I then tried to access my account via ww.wp.xz.cn entering my log in details ninataylor and password. but it wouldnt let me in. My intention was to move the blog to the new directory ninamarika.co.uk/blog. I then tried to manually install wordpress into a mysqldatabase which also didnt work. 123reg tell me i need to upgrade my hosting account to enable wordpress but I didnt do this before so I am wondering how I have had a blog all this time working. I then pasted the previous wordpress directory back to its orginal location on my ftp being careful not to alter anything. And it wont work. I get a favicon only when I access the url. Can you help please? I have tried to setup a new wordpress blog but it says my name ninamarika has been taken, but wont let me log in with my correct username and password. Can you get me access to my account and help me change the directory to ninamarika.co.uk/blog?

Thank you