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Hi Marijaz,
As per the description above, you want to cancel the Adobe PDFPack service and get a refund so that you can purchase the correct Adobe Subscription. Is that correct?
For the cancellation, refer to the following link: helpx.adobe.com/in/document-cloud/kb/cancel-subscription-acrobat-online-services-dr.html
You may have to contact the support team for the cancellation/refund/new purchase, Contact Customer Care: helpx.adobe.com/contact.html
Sign in with your Adobe ID and password to contact the support team.
Hope this helps.
Regards,
Anand Sri.