I cannot find themes

ok i was offered wordpress blogs through my website’s install central, and the blog is hosted through my hosting plan, i wanted to install a theme to make the word press look as if it belongs to the rest of the website. i was told to upload the theme to the server according to word press to a folder named wordpress/wp-content/themes which is what i did and when i long into word press via the dashboard i don’t see it, is there another folder i should be looking for to upload my files this is extremely frustrating.