Irritated

My ex wants to bring his family and friends to his supervised visit but didn’t ask me and is making up his own rules last time his mom came with his grandma and they were talking shit in Spanish and his mom tried to change the baby’s diaper without asking my mom whom supervised the visit. They were asked to leave he started yelling at my mom. During mediation I asked the mediator who was allowed to be there she said my mom, the baby and him but she forgot to put it in writing. What do I do? I filed a court date but it’s not until sep 11, also I don’t trust anyone on his side of the family.