@Lockdownmama2021 regardless of this incident, I've always found it imperative that I have a good amount of confidence in childcare providers and the setting my DCs were at
Mine are mid and late teens now, but the one time I listened to others like some of these frankly malicious replies here, my DD was injured by a child at nursery. I had spoken to their keyworker a number of times regards my concerns for my DDs safety around this specific child, and been fobbed off.
In the end, the child hit my DD so hard, her head smacked a table as he hit her from behind, he was huge compared to her and she was sitting doing an activity. First he pulled her hair, and when the trainee keyworker(who was meant to be shadowed by someone senior) told him not to do that again, he hit my DD incredibly hard and her forehead smashed into the table. We had to take her to A+E because the lump she had was huge.
When I spoke to the lead of the nursery, her attitude was "well kids will be kids" and that DD was fine so no harm done! I was livid and said I and other parents had red flagged that child, that he was a bully and the size of this kid compared to the rest.
I gave notice to them on that phone call, and when I went to sign paperwork and collect some things of DDs, his equally vile mother made comments to me about DD and it was obvious there was a huge safeguarding issue which nursery should have reported.
I've never not trusted my gut since and actually moved both my DCs from a primary school at one point because once again they were being bullied and school failed to act, after a few months of escalation that was it, de-regged, home schooled for a month and then sent them elsewhere when a place came up- and they thrived there
Trust your instincts, the keyworker words were hurtful, shaming and failed to take responsibility for their part in failing your child. I would be giving notice.