Cut ties with them. Life is too short. If you want to be nice you can say their daughter is great but you've cost her a spot on this team. Let the poison parent be someone else's headache.
^^^^^^^^^^^^ This.In person or over the phone:
"I love Katy and wish she could be on my team forever. But I can't have you and your disruptions here so I am letting her go. I'll do the math and see if you have any refunds coming. You'll see a response from me on that subject via email soon."
Case closed. No further discussion required.
The other thing about email is how often it is misunderstood. So many times I have written emails that I had believed were totally clear. However, it turned out that it wasn't the case.
The other thing about email is how often it is misunderstood. So many times I have written emails that I had believed were totally clear. However, it turned out that it wasn't the case.
So true. What's clear to me seems to be unclear to many others. You know, like "This Saturday's schedule will be played next Saturday due to the rain." always nets me several responses similar to "Can you please send me the updated schedule?!?!?! My parents are freaking out!?!?!?!"
EDIT: My point being that with a much more sensitive situation like the OP, email = bad idea.