Look in your Paypal account.
Is the payment recorded there?
If so you have paid.
But today is only the 28th.
Your item probably will not arrive for another 10 days from North America or another 20 days from Asia.
Mark those dates on your calendar and come back if nothing has arrived by then.
If the seller is claiming that you have not paid, give her the Paypal transaction number in her Dispute.
It is possible that she entered her email incorrectly and has not in fact received the money you have paid.
If not the transaction number ends the Dispute in your favour.