Gliffy is not Available after License Purchased Successfully
Gliffy license has been purchased successfully but after some time, it is still not available in the desired products (JIRA or Confluence).
Gliffy license might have been purchased for the wrong product. Check if the license is for intended product in https://my.atlassian.com account which holds Atlassian Cloud license.
Contact Atlassian sales team for transferring the license. See Atlassian Contact for contact information.