When you visit Adobe's site it defaults to USA but you can change that. I think all that has happened is that you have started the process with one country and then tried to buy naming another country.
Look for Change Country. Austria is near the start of the list but spelt as you would spell it
If that's not it, add some screenshots showing Austria set as the country and the message you get. I will relay it to someone at Adobe to get you some help.
Nobody is asking you to move home.
See www.grainge.org for RoboHelp and Authoring tips