I've added the .com domain to your account for you. Please note that it may take up to 2 hours for the domain change to take effect, and it will not work until you set up your DNS with your domain registrar.
To configure your DNS, please see the steps provided on our Wiki to either set NS records pointed at the HelioHost nameservers, or create A/AAAA records and point them to your server's IPv4/IPv6 address: https://wiki.helionet.org/Addon_Domains#Custom_Addon_Domains
If after a full 2 hours it doesn't work on your side, please make sure you clear your web browser cache: https://wiki.helionet.org/Clear_Your_Cache
If you can't access any of the Wiki pages, please let us know what IP address was shown on the error page.
If you no longer need the marchasdecristo.jaguerra27.helioho.st domain, please let us know if you want it removed. You're allowed to have up to 15 domains on your Morty account (and allowed to get more than 1 Morty account if you need more domains), so it's no problem to keep it for now and decide later on. 🙂