Switched Hosts – Website Broken

Here’s what happened.

We’re a small business with a website (wayback machine link because website is currently borked). We changed webhosts/registrars/whatever because the old webhost was letting us update to the newest version of WordPress.

Website was transferred yesterday but because we don’t know what we’re doing the website is now broken. The new webhost is Bluehost.

Now, our website WAS built in wordpress but now we can’t log into the WP account for the site. Is it because we changed webhosts? Should’t we still be able to log into the wordpress site? Someone PLEASE help.

Also, if this is in the wrong forum, please tell me.