Very upsetting to read I hope the childcare do something about that carer.
We had an incident with my son a couple of years ago in the childcare and they ended up firing the carer over it. She was the room leader too!
If you feel uncomfortable about their practices, I would definitely speak to the director. If things need to change or be clarified for you to be comfortable sending your daughter there, then it's important for you to speak to them.