You've done the right thing by informing your manager. I'm not sure I can say the same about your manager.
It really should be up to you to choose the best coursevof action to resolve the issue. Most employers favor the informal approach ( e.g. an apology or mediation) but you don't have to agree.
Depending on your employer's policy and procedures, you should also have the option of making a formal written complaint. This will prompt an investigation and if your allegation can be substantiated disciplinary action would likely follow.
You can also take your complaint outside your workplace. There are a number of choices, Fair Work, Human Rights and Equal Opportunity Commission or union ( if applicable).
I suggest attending the meeting, asking about your options and asking for support to pursue your chosen path.
Hangvin there. I know it's hard and I know you're struggling but it's really important to do what you can to ensure the harmful behaviour stops.
Kind thoughts to you