Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Hello Camille Ganir,
This appears to be related to the Microsoft Online Company Store moving to a new e-commerce platform. The old Digital Locker page now confirms that transition and directs customers who need help accessing the new store to the Consumer Care Team.
I would contact them through the Company Store login assistance page and explain that you purchased several Microsoft 365 Friends & Family subscriptions through the old store and can no longer access the remaining purchases after the migration.
I would avoid trying to purchase anything again until they can verify the old account and orders. For issues specifically with the software after you recover the purchase information, the Digital Locker page directs customers to Microsoft Support.