Hi and welcome to FixYa!
This is what their site policy is;
Your Inbox.com webmail account is a free service and does not require
Simply stop using the service if you no longer want
to use it.
Your account will be completely removed from our systems
after 3 months of the last login to the account or after 2 months
following account registration if there have been no logins to the
Removing your account includes removal of all your messages, attachments and stored data. If you have upgraded your Inbox.com account to some of our paid
plans, and cancel your account within the paid period, we do not refund
You may have to use something like Revo to uninstall this program as well. A lot of people are having issues deleting everything out, even when they go through and manually delete the program and toolbars.
You can download Revo for free at http://www.revouninstaller.com/revo_uninstaller_free_download.html
Just click the link, download and run the program. Just be careful. Revo is very aggressive software. Only click what you want deleted when you run Revo.
Hope this helps, KittyTech
If you need further help, reach me via phone at https://www.6ya.com/expert/carolyn_427ff26936286336