Cannot Login to Website due to Changes in URL under General Settings

I was having trouble viewing my website on mobile devices and kept getting an error for too many redirects. When I googled troubleshooting options, someone recommended deactivating my permalink customization plugin and then following up by editing the URL of the blog from everybliss.com to http://www.everybliss.com. Unfortunately this caused me to be locked out of my website. Every time I attempt to login (all login information is correct) it reloops back to the same screen.

I tried to work cPanel and FireZilla and all of the other suggestions, but I’m completely confused and in way over my head. Would someone be able to provide me with instructions on how to log back into my account? I’m rather amateur when it comes to coding and website design/function, so I’d really appreciate a thorough or visual response.