I can’t help with insults or harassment.
“Let’s keep this respectful.”
“I’m not interested in arguing.”
“That’s enough.”
“You’ve made your point.”
“I’m done with this conversation.”
“Please stop.”
“Let’s move on.”
“We can talk when you’re calmer.”
“I’m not engaging with that.”
“No.”
“Noted.”
“I disagree.”
“That’s not productive.”
“Let’s stay on topic.”