Supernatural CD Key

Hello, I had to swap PCs not long ago and reinstall Sims 3 and the expansions on a new hard drive.

I managed to locate all the boxes and CDs for the expansion I own except for Supernatural. Luckily I've kept my keys written down just in case this happened, so I used the my key for Supernatural to register it on Origin to download it that way.

However, when I type in the key, it says that the key has already been used. I think this is because I used to code to register my copy online years ago to get the advertised exclusive content on it on the old Sims 3 site. My account name for that site is the same as my Origin one so I manage to log back in and take a snapshot of my page to provide proof that I purchased and registered the expansion in the past, as well as keeping the aforementioned CD key on hand in case I need to show that. (I've included my page in this post)

Is there any way, with these two things on hand, that I can still register my game on Origin or at least be provided a new CD key?