can not access my wp back office

This is how i messed up:
Under ‘General Settings’ I renamed my website url
from: https://www.123online-profits.com
to: https://www.123online-profits.com/home
or: https://www.123online-profits/home.com

now when I try to log in to my wp back office it says:
contact the server administrator, [email protected]
but when I try to email them it doesn’t go thru

And my website is messed up to.
How do I change it back to: https://www.123online-profits.com
if I can’t log in?

Please help me,
Duane Marx