negative feedback

[puppytail3]

I had a buyer who made a purchase and when I was packing up items I broke two of the four items.  Refunded the buyer and explained what had happened.  We canceled the purchase and now she has left me nasty negative feedback.  I can't even respond to it and I have never had any negative feedback. 

Is there something I can do?

Thank you both for your answers.  I should have taken a picture of the broken glasses.  I did offer her the other two glasses but she didn't want to wait on that.  I appreciate your help.  I just didn't think of someone thinking that I was not telling the truth but I guess it happens more than I realized.