I have never taken a class for that exact reason - either they really don't know how to teach or they aren't particularly interested in teaching.
I have found that if I sit myself at my sewing table and sewing machine,read through the directions, follow them and then put it together, it means more because it is a total one on one experience and I am teaching me! I know what I can teach and if I can't teach myself how to do something, either I ask you or I just keep trying until I get it. You can bet I have my full attention.
Get your money back - all of it! You wouldn't have bought the material had it not been for the class. You may have made something else, get your money back!
You know, we all have to be our own advocates and if just one of us speaks up for ourself, we are speaking up for everyone else. I have spoken. Edie