Hi,
Please visit this page https://support.atlassian.com/
Then log in and you'll properly see the 'Create a Support Request' and click on 'JIRA' under the 'Atlassian Cloud'.
You will see many categories of support type:
Or
https://confluence.atlassian.com/display/JIRA/Getting+Help#GettingHelp-RaisingaSupportRequest
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.