Complain and ask for your money back. And just like you're doing on-line here, tell everyone you know to spread the word about the un-class.
I've been fortunate to attend some fabulous classes. The very best have been through local guilds where a member gives a class.
And this board and many of the blogs/You tube quilting videos and other quilting sites have been a phenomenal source of information, inspiration, and encouragement.
Hope this wretched experience doesn't sour you on a wonderful hobby........well, maybe obsession!