There is a template for applying for labor arbitration online. Otherwise, you can consult the staff when you arrive. Just write your basic information on an A4 piece of paper, and then describe what you want to apply for, that is, what happened. Just hand it in.
This will come down soon, and you and the person in charge of the unit will be informed to mediate in about 3 days. If you don't get double indemnity insurance, the insurance will either make it up to you, or you will lose money, usually losing money.
I hope you are all right. ...