It is going on 30 mins, and i need pptx asap
Sorry for the delayed response and inconvenience caused. AS per the description above, you are not able to download the converted PPTX file exported from PDF, Is that correct?
The record shows that you are subscribed to Adobe PDFPack services with your current Adobe ID, try downloading the converted file from a different browser like Chrome or Firefox or Safari.
The download completely depends on your connection speed to the Internet, and the complexity of the document you're converting (number of pages, content) affect how large a file you can convert.
You can get the file from https://cloud.acrobat.com/recent
If the issue persists, please connect to a different network environment and check.
For troubleshooting, you can refer to Troubleshooting Create PDF, Export PDF, Adobe Send, Fill & Sign … services(PDFPack or Document Cloud...
Let us know how it goes and share your findings.