Sons father refuses to watch him

My sons father broke up with me last week. He’s been watching our son the past few months on Monday and Tuesday while I work. He decided this week he can’t watch him and shows up at 10:30 at night. He said I’m being childish and I need to grow up because I’m making. Big issue of him not watching him. He won’t even help pay a sitter. He said he had business to handle that’s why he can’t watch him. 🥴 What do you guys think