Hi, fellow alumni.
I've been reporting the "This store isn't available in your country" issue when signing-in to the new Company Store since early July ... but have not had any help or support from the company store team, nor the Alumni organization.
However ... I just stumbled across something by accident and hope it helps others ...
If you're looking to renew your O365 Family subscription, note that you can now request a product key from the "My Benefits" section of the Alumni site here: https://www.microsoftalumni.com/mybenefits/
Of course, this doesn't help those of us also needing to renew O365 Business etc., but it at least gets those of us with decades of email, OneDrive file & photo storage, etc. tied up in O365 Family.
Hopefully, the Store/Alumni team are aware of this (major) issue and are working toward a solution, but the way that this migration has been handled and communicated, and how poorly issues have been handled (i.e. not at all) is an utter disgrace.
Do better, Microsoft ... quickly.