I would take the "my email is working fine" as a response right there. What more are you looking for?

What arrangements have you made to clear up her payments? Did you give her a day and time or a way to drop off payment?

Did you give her a way of picking up her daughters things?

Maybe a follow up email giving proper direction ?

When I terminate I do it after all payments have been made.

I highly doubt you'll ever see this client or her money again. And the text was sent to get you off of her back I'm sure.