We're sorry for the delayed response and inconvenience caused. AS per the description above, I can understand that you are getting charged to a canceled subscription of Adobe ExportPDF, Is that correct?
I have checked the records with your current Adobe ID which you have used to sign-in on Adobe forums and found that the Adobe ExportPDF service was canceled on 7/19/2018 and the refund was also processed.
You can check the status on Adobe.com, log in on Adobe.com, select Manage account>plans and products, you can also refer to Account and membership help
If you need more clarification, you can also contact the Adobe support team through Contact Customer Care
Feel free to update this discussion for any further assistance.