website login/address problem

I was changing the general settings within the admin section, making the website address a www address instead of just the name of the website. I accidentally changed the website address to wwww, instead of www, and now I can’t do anything. You can open the website at http://www.geckolvldesign.com but everything loads incorrectly, and when you try to go to http://www.geckolvldesign.com/wp-admin, it tries to take you to wwww, which obviously doesn’t work. I have no idea how to fix this, please help.

TLDR: Website address got changed to wwww.geckolvldesign.com, and now I can’t get into settings to fix it.