Unable to reapply to Android Enterprise Partner Portal after email-address rejection

Hello,  
We previously submitted an application to join the Android Enterprise Partner Program / EMM Community for Plettac Electronics Argentina S.A.  

The application was declined because it had been submitted using a generic company email address. We were instructed to reapply using an individual company-domain email address.  
I am now reapplying using my personal corporate account, associated with my name. 
However, during the onboarding process, when I enter our existing and valid D-U-N-S number, the Partner Portal displays the following error:  
“Something went wrong! If this problem persists, please contact support.”  
The same D-U-N-S number was successfully recognized during our previous application.  
Could you please advise whether our organization or D-U-N-S record may still be associated with the previous application, and how we can correctly reapply using the individual corporate account?  

I can provide the complete D-U-N-S number privately to an Android Enterprise team member if required.  

Thank you.