cannot login after incorrect domain change

Hi,

Complete Nube here but have fumbled my way though to finishing or almost finishing my first WP site. I currently have the site https://www.niagarabarber.com hosted with hostgator. Today we bought 2 domains and hosting package through godaddy. https://www.barbersedge.ca and https://www.thebarbersedge.ca.

I had mistakenly thought that I bought https://www.barbersedge.com, and turns out that I purchased https://www.barbersedges.com.

I went into my admin dashboard and under general where the URL settings are. I replaced both URL settings that were niagarabarber.com, to barbersedge.com.

it gave me an error message, my computer froze and I rebooted. when I log on to the website now it is redirecting me to hugedomains to buy barbersedge.com for $2200 (yikes)

Also, the website has been altered in terms of its appearance. Its skewed all over the place and I can see the hugedomains logo.

of course I dont have a backed up folder on my computer of all the files (yes I know) and am locked out and without resolution right now.

Can someone please help me get my website back? ??
sorry if this is repeated but I read every post i could find on the login topics and nothing was a similar issue.

Thanks everyone