Lost our website

So today we were having trouble with our old website popping up when going to our fairly new WordPress site which is about one year old. The only way to access our most recent site was to manually put in our web address http://www.substreammusicpress.com/home. If you did not include “/home” it took you to our old site. I checked our account with our hosting company and everything there seemed to be working correctly. I then logged into the admin section of our WordPress site and things there seemed okay as well. While fishing around, I went into General Settings and changed our address from http://www.substreammusicpress.com/home to http://www.substreammusicpress.com just to see what would happen. When I did that, I was directed to our old site and was not able to get back into our Admin section of WordPress. No I cannot access anything nor can I log into our admin section anymore. Please help!!!!