My domain gets redirected to an older one, no matter what I do

I am trying to set up a simple website, like I’ve done a dozen times, with no problems. Initially, I created a subdomain of my own domain, great-roofing.edvelaj.net, pointed it to a folder under /var/www and it worked fine. Later, I bought the real domain, thegreatconstruction.com the one I intend to use for this website, replaced it in the apache configuration, and deleted the old subdomain. Now whenever I go to thegreatconstruction.com, it gets redirected to great-roofing.edvelaj.net, no matter what I do. I deleted the apache configuration, deleted the files under the /var/www folder (in case the .htaccess or any other file did any tricks), deleted the domain configuration on the digitalocean panel, it still redirects without fail. What is happening here? This is beyond frustrating.