Apparently, she is "pulling strings" and she needs to learn the "correct" way to play. I mean, she is 2 years old, for crying out loud! .........but they said "bad habits will form if she is allowed to do what she wants" and "all the other kids had to do it this way".
These comments would concern me enough not to return. The instructors are not even listening to what you (the parent) are saying.