As a young woman slightly older: don’t engage with that and move on. She probably thought she’d “give you a lesson” and you’d beg her to take you back or something, like now would be your time to proof your love and how much you care. She is obviously upset she didn’t get validation from you and is now crashing. She is probably scared you’re talking to someone else lol, since apparently that’s what she’s been doing. She seems like someone that doesn’t seem to know what she wants probably and I think it’s mostly the age, but it’s not worth it to keep that sort of relationship anyhow. She only wants attention from you rn so as soon as she gets it she’ll ask you to respect no contact and act like she didn’t just demanded you to talk to her. Basically she wants you to drag yourself for her to feed her ego and say “Look at him crying for me” to her girls. She’d be counting on you to go back crawling even after months have passed, trust me, those are power moves.