I had exactly the same problem. Check your account’s region at account.samsung.com
Look under your profile, and you’ll see region. If it doesn’t look like this (see below), you’ll need to CALL Samsung’s customer support number. ST support can’t help, and they’ll refer you there too.
When you call they’ll validate your address, and then create another ticket for another group that will send you an email for verification. Once you do that, you’ll get another email and then within 24 hours your region will be updated by them.
Been there, done that…