Hello Ruben Cammalleri,
Thank you for posting in Microsoft Community forum.
If you're unable to retrieve your licenses through the VLSC, you can try contacting Microsoft Volume Licensing Service Center support directly. They should be able to assist you with retrieving your licenses. You can find their contact information on the Microsoft Volume Licensing website.
Additionally, if you have your Authorization Number, Purchase Date, License Number, and Microsoft Invoice, you can use the Microsoft Licensing Activation Centers to activate your licenses.
You can find more information on how to do this on the Microsoft Volume Licensing website as well.
I hope the information above is helpful.
If you have any question or concern, please feel free to let us know.
Best Regards,
Haijian Shan