“Inactive account”, but I’ve never created one

I'm trying, for the first time, to register as an Adobe Stock Contributor. I've never done this before. I do, however, have an Adobe ID, which is used for my subscription to Adobe CC, Lightroom, etc.

I visited the Stock Contributor page, and selected "Link Adobe ID". Upon doing so, I'm redirected to a page with a header reading "Inactive Account" and a message stating "Our Account and Submission policy does not allow multiple Contributor accounts. To request an exception, please contact us".

I'm not sure where to go from here. I sent an email using the link provided and explaining what happened, but that was a week ago. I'm tempted to Log Out of my existing Adobe ID and just select "Join Now" using a completely separate email address, but also don't want to cause more issues.

Any idea why Adobe thinks I have multiple contributor accounts?