Changed URL in Settings WordPress Site has Dissapeared

I tried to change my WordPress site from https://www.larosaskateboards.com to larosaskateboards.com. First all, as you can see all that comes up is my host saying the site is parked somewhere else. When I try to go back into my original site everything is gone and I can no longer log in to my site’s admin panel.Even Google sent me an email today saying there is something wrong with my website.

I watched a video on You tube about fixing this mistake and it did not work. Even after I changed the URL in my MY SQL database nothing happened I’m a bit of a n00b when it comes to this back-end stuff so I have no idea how to proceed from here.

Any help would be greatly appreciated, thanks.