My schnorrer hatha yoga teacher

Class one:
Me: How much do I owe you?
Her: $18. $20 if you’re not ganna come back.
I gave her $20

Class two:
Her: Pay me next class.
Me: Ok.

Class three:
I couldn’t make it so I sent her an email-
Me: Hi, I can’t make the class tonight. Can I send you a check for last weeks class.
Her: Sure. Send a check for $25 to so and so address.

I honestly liked her class but because of her greediness I will not be returning. And I will only be sending her a check for $20. Her Yogi ethics are very very bad.