Now I read that she is making another appointment! What is going on here. Not in this life time would I EVER re-book a new client who "forgot" to pay even after a reminder let alone one who IGNORED my attempts to make contact and figure out why she didnt pay.
In this case like I said before Things Happen that YOU allow. So take on a client who is unreliable and you will reap the horrors of that. She has shown how much she respects you already. So if you like having clients who are rude, late, forget you, dont show up, expect you to go above and beyond all the time, well then thats what you will get.
I would have made sure to say that based on recent events you feel she is not a good match with you as her nail care provider. Period.