Unable to join Adobe Stock as a contributor due to multiple accounts

Hello Adobe community and support team,

I have been a long-time subscriber of the older Photoshop + Lightroom plan, and recently I became interested in joining Adobe Stock as a contributor.
However, when I try to register, the system says there are multiple Adobe accounts associated with my personal details.

I have already submitted requests to delete the extra accounts via the official form and email, but I have never received a human response — only automated confirmation messages. The problem remains, and I am still unable to proceed with my contributor registration.