Did you buy PS through a school at a cheaper price? If so are you still in school? The school may have deactivated licenses for students who are no longer attending. The idea of an academic license is that it would be used while the student is in school and then used as the basis for an upgrade to a non-academic version once school is finished.
If this serial number is for a regular, non-academic version and cost $1000 then I’m not sure what to say other than start a chat session with Adobe and see if they can figure out anything from their side.
We are basically users and can't really help with activation. So unless a staff member can check in, you need to speak to Customer Service.
Serial number and activation chat
Monday—Friday, 5am—7pm PT
Same here, but mine just tells me to register my TRIAL version. I do, and it works..until the next day..then same crap all over again. I bought and paid for this software 2 years ago, and registered it. Apart from the well documented issues with update 13, I have not had any trouble UNTIL THIS WEEK with CS 6. More nonsense to force us into the blasted CC version? I think so.