I checked and it doesn't looks like you've had any contracts on Upwork. Please, make sure the client sends you an offer, you accept it and see an active contract under My Jobs tab before you start working on the project. You can share this article with the client with detailed instructions for how to send an offer and hire you.
There is no reason to send any more reminders to this client.
She tricked you into working for free.
This reflects poorly on her character, but it is a good thing for you.
This helped you to learn how to use Upwork properly.
In the future, you will not work for free. You will verify that you have a valid contract (listed in the "My Jobs" tab) before you do any work for clients.