Hi please help me!!!

on may 20th i paid for my items.

Seller gave tracking number eventually.

Tracking information stated that my items were being sent to Greece and were going to be delivered there i live in the UK and gave seller correct address.

I contacted the seller who told me he/she would give me a full refund today, as it was the post peoples fault.

She told me to wait a few hours for the refund so i did.

I have now logged in to find that the seller has filed a NON PAYING BUYER mark against me!!

I Paid via paypal.

I now have no way of disputing this seller. 

Please please help me 

i have proof of paypal payment and of tracking number