KLZ, I know you don't want to hear all these things. Especially when you just bought a new dog.
I am from Germany. I come from a family of successful breeders so I grew up with the breeding, titling and selling business in Germany.
I don't think these people have been dishonest. They showed you exactly what this dog is. GREEN with some foundation work.
To be absolutely honest, I don't understand why it had to be imported from Germany. You have some really good breeders and trainers in Texas. I've been to the Schutzhund Club in Austin and you would have been better off in going there, talk to the helper and the people (if you are close) and see if they can hook you up.
The west German working line dogs in the US come from the best possible stock you could have bought in Germany.
The Americans have done a great job in importing the creme de la creme out of Germany, they have done their homework. Many breeders, like Chris Wild, know what they are doing. They have produced excellent dogs that are just as good, sometimes even better, than the ones you get out of Germany. If you want a real dog, you can get that dog in the US and you can look at that dog yourself and see it with your own eyes. The only thing you can't say is that you bought that dog in Germany.
Sadly, in your case, it seems to be that one important thing. That you have imported that dog.
Since you bought that dog, and you were able to afford up to 12k for it, I doubt you'll have any issue to join a club, put in the time it needs to keep training and turn the dog into the dog you want him to be.
Here is the South Central Region. Go to clubs and you will find a list of Clubs in Texas.
IF you are anywhere near Austin, I can only recommend the Austin Schutzhund Club. It is a great bunch of people and the helper says it the way it is. He knows what he's doing and will not BS you.
Again, I know that these are probably not the things you want to hear. Your "Bueller Bueller Bueller" reaction made that very clear, but it needs to be said.