@alisonhansford First thing that is coming to mind here for me is I’m wondering about the biter. Why are they biting, what are the circumstances around it, etc.
Before anyone gets upset, I’m not saying that OP’s child is provoking the biter, just that biting is usually done in response to something. It could be due to an overload of emotion, being unable to communicate effectively, anger, a disagreement, etc. So I do wonder what is happening before the bites, how OP’s child fits in, if they’re unprovoked (they sound like they are), etc, because that can give a lot of information and help solve the issue.
For OP - your child’s safety comes first. For you it really doesn’t matter why the child is biting unless something your child is doing is provoking it, but from what you’ve said it sounds more like this child is fixating on your daughter more than it being that kind of a situation.
If it was me, I would remove my child, make it very clear to the centre that you don’t not feel like your child’s safety is being taken seriously as the biting it continuing, and find a new place.
As much as I know you want to talk with the biters parents, I wouldn’t. You’re going to be talking to one of two types of parents. The first being the ones who don’t care, the second being the ones at their whits end trying to work out how to stop their child and help them with this. If it’s the first, you’re just going to get mad. If it’s the second, you’re berating parents already doing everything they can to try and stop the problem. Either way, it’s not worth it for you.
Put your child’s safety first and get her out.