Hello Jayne Brown,
Thank you for posting in Microsoft Community forum.
To retrieve the key codes, you will need to contact the Microsoft Volume Licensing Service Center (VLSC) support team. They will be able to assist you with accessing your account and retrieving the key codes for your licenses.
You can contact the VLSC support team by phone or email. The phone number and email address can be found on the VLSC website.
Please note that you will need to provide your Microsoft account information and proof of purchase to verify your identity before the key codes can be released.
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