Sitemap showing old domain - Search Console
I'm having an issue where after submitting my site to Google via Search Console app, it's showing 7 errors. The errors are due to the sitemap still showing the old default domain: (cornerstone.getiodized.com) and I can't figure out how to correct this.
Site in question: cisoutheast.com
What happened was my client had published the site for the first time on the default domain. Then, a day later I updated it to the custom URL he had purchased.
I've already removed the sitemap via the full Search Console, and tried resubmitting, but it's still pulling up as the old one. I've also added 301 redirects to each page still using the default domain.
Also, if I go to the default domain, it's still loading, though not secure.