user&pass correct BUT always coming back to login

Hi! Yesterday I changed the WP directory… and I ruined it!!!
I left the blog url in https://www.balanceyexceso.com.ar, but I changed the WP url to the the original hoste one: https://www.balanceyexceso.byethost6.com

As a result of that, I could see the blog but without the theme format. For fixing that, I copied all the htdocs directory from root/balanceyexceso.com.ar to root/ and It worked it for viewing the blog… but not for login in.

Now, in both adresses (.com & .com.ar) , when I try to enter wp-admin, I′m bein redirected to the .com (https://www.balanceyexceso.byethost6.com/wp-login.php?redirect_to=http%3A%2F%2Fwww.balanceyexceso.com.ar%2Fwp-admin%2F)
BUT I cán′t log in because I′m always coming back to the same window

HEEEEEEEEELP!!!!!

And thank you very much.