iCloud storage upgrade
hey there,
did you manage to upgrade the storage.
I have not be able to do so, and yes I have tried all of the apple community advice.
You can try with another device(if you have)
or another card,
If you can't or it still happens:
Contact Apple for support and service - Apple Support
I'm just a user like you so I don't know why it does not work for you
Good luck!