I have a Sony Z5 which was purchased overseas, it will not download the latest update to Nougat but I can see that Nougat (Android 7) is now tested stable and released via optus.
My friend has the exact same phone pruchased overseas and it has updated to nougat.
It might be worth a try using a VPN. Download the Opera VPN and connect to Canada. Then go to your settings and see if the update is available. If that doesn't work try Germany.
Hi @Barthez016 sorry to hear about the issues with your updates, have you since been able to download the new software?
I would send PhilC a private message with you service number, full name and date of birth. Include as much details of you phone and see what he can do.