Hi Danielao,
As per the description above, you are not able to use the Adobe ExportPDF services as it's directing you to a purchase page, Is that correct?
The record shows that you have an active subscription of Adobe ExportPDF services Using Adobe Export PDF on your Adobe ID.
You can use the services through your online account, Sign in to your account at https://cloud.acrobat.com/exportpdf with your Adobe ID and password.
You may also install the free desktop version of Adobe Reader to use the services of Export PDF. Sign in with your Adobe ID and password in Reader DC.
To download Reader DC: Adobe - Adobe Acrobat Reader DC Distribution Link: https://get.adobe.com/reader/enterprise/
Hope this helps, and keep us posted with any further query.
Regards,
Anand Sri.