Can't you report them? If you felt unsafe, and the level of instruction was not above and beyond your expectations then you should have notified the Sheriffs dept.
I too worry about all the "Courses" showing up out there now. I spent 6 months researching for a place to Obtain my Permit. And when I did My expectations were exceeded.
I run into my courses instructor from time to time at the range and chat with him, follow him on Facebook and refer his Company and course. He still takes the time to answer my questions.