Hi @stylish_Mermaidf8e6,
Thanks for reaching out to the community.
We can see that you currently have two Premiere plans on the account. Since you're already subscribed to another active Premiere plan, we recommend contacting Adobe Support for assistance with the older subscription. The support team can review the duplicate plan and help you with the available cancellation options.
You can contact Adobe Support using the link below:
https://helpx.adobe.com/contact.html?rghtup=autoOpen
If the Manage Plan page continues to load endlessly, please try signing in through an incognito/private browser window or clear your browser's cache and cookies before trying again.
Please let us know if you have any other questions or run into any issues. We're happy to help.
^Akansha