I can click on the blue 'person' icon in the bottom-right corner, and can delete the account and all payments to Atlassian, but I can't access the project settings.
Any help would be greatly appreciated.
Looking at the screenshot that you sent, it appears that you are not the site-admin of that Jira Cloud site. Also, removing yourself from the site-admins group is not possible.
If you say that you are the only user of that Jira Cloud site, please check if you are logged in with the right account. Otherwise, please contact the site admin and ask them to add you tot the Jira administrators group.
Welcome to the Atlassian Community!
Most likely you are a site-admin but not a Jira administrator. To fix this, go to the site administration area (click on the 9-dots at the bottom left → Site Administration. In there, locate your user and click Show details on the right. Click on Add to group and then add yourself to the group Jira administrators.
This should allow you to view the Jira Settings section.
@Elyse Dabeast Since the creation of this thread (Feb 2019), the UI of Jira has changed a bit.
In order to add new people to your site, you can go to the site administration area: Click on the cog icon next to your avatar (At the top-right corner of the page), then click on User management. In the page that follows there will be a blue button that reads "Invite users"
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