As per the description above, you want to cancel the current Adobe PDFPack on your Adobe ID, Is that correct?
You may refer to the following KB doc for the cancellation Cancel your membership or subscription | Adobe Acrobat, Document Cloud PDF services
You may also contact the Adobe support team through Adobe Support
I have also shared the direct contact number of Adobe support via private message, please check your email inbox.
Feel free to update this discussion in case you need further assistance.