I agree with this op. I’m also concerned you don’t seem willing to look at your side, but instead have decided it’s racism, which it may well be, but you’ve hardly covered yourself in glory here, not speaking to her, feeling forced to work with her, multiple emails asking for her to be fired.
you need to try to think and articulate yourself clearly and coherently.
if you’re overwhelmed and need more time with your kids. Speak to your manager,
if you feel you’re subject to racial discrimination then collate evidence and speak to hr.
if you feel you’ve not been bullying this woman, and it doesn’t look exactly like you have not been, then prepare your case to specify why this was not the case, how you’ve tried to work with this woman, the support, guidance, and instruction you have given.