Go to the credit card you really paid with. Paypal is just a useful mediator.
Call the 1-800 customer service number and ask the clerk about a chargeback.
Have all your dates, payments, transaction numbers, currency etc handy for her to process your refund.
Act now, cards have longer deadlines, but they do have deadlines.
If you or the seller left any feedback, you can add a Response indefinitely. The most effective Responses are calm and factual. 'Paid 31/10/14. Never rec'd. Seller unresponsive." for example.