Not sure what was the point of her arguing though. Just for the Tik Tok video?
It's not like you will argument yourself out of being terminated.
I also find her argument forced. "Just because I haven't closed anything, it doesn't mean my performance hasn't been good", that's nonsense, it's sales, performance is valued on sales.
Not closing a single sale in 5 months does not qualify as good performance, and you don't need 1v1s with your manager to find this.