User Activity

I have to refund her even though she did not contact me and has already left a negative. I know not to take it personally but I am not happy having my feedback tarnished when I know I am an honest seller. This makes it so unfair for the rest of the b...
who I have a gut feeling about and not in a good way. How can I block her and make her go away? She has no feedback and is already telling me she has had problems with sellers.Thank you.
I have follwed the instructions on changing the International postage option to flat rate but it does not change. It just says "You haven't selected ant international shipping options.