Would you allow your child to be talked to this way or am I just being crazy?

So I signed up my son (26 months) for mom & tot gymnastics class. He took gymnastics back when he was 16 months-20 months but then we quit due to scheduling even though he loved it. Now I decided to sign him again-only the original place is no longer doing the class for children under 3, so I had to find a new place. So the class starts and we all walk in the gym (there are about 8 other kids in the group) My ds is the only new person. I tell the instructors (there are 2) right away not to touch him. If he needs to be guided physically to let me do it because he doesnt like for strangers to touch him. They say ok. We're waiting for everyone to get into the gym and ds starts walking onto a mat. One of the instructors grabs his hand and pulls him towards me. DS starts crying and I say "did you forget that I just said not to touch him?" and she replies "well you need to keep closer tabs on him"

Fine. next they have some sort of obstacle type course they have to do. DS isnt at all intersted as he sees other things he's rather do. But I try to coax him into doing it. When he isnt cooperating the instructor gets a really mean sounding voice repeating his name over and over and over and says "DS do you need to sit in the corner???" and I say "excuse me but you will not be discplining my child in that way" and she says "Well mom he needs to learn how to follow directions. He is obviously lacking in that area. How do you expect him to go to school, if he cant behave?"

So I picked ds up walked to the front desk, asked for money back, got it and left.

Am I overreacting?