Cannot Log in to my WordPress Admin Panel

Hello,

I recently moved my blogger blog to WordPress and a programmer I hired did the transfer. It was runnining on WordPress just fine and now I couldn’t get into the Admin Panel and I get the emails to approve the comments but when I clicked on the “approve” link, it takes me to the page that said “Blogger Cannot Find Your Page”. Is there anything I can do about that? I couldn’t seem to get in touch with my programmer and I’m a little nervous about this. I tried to get into Admin Panel with the username and password he gave me, but it gaves me the error page HTTP405. Can anyone help me? Thank you.