I sold an item and the first thing I've heard back is negative feedback to say it doesn't work. I think this is really unfair as they never contacted me to say so and to let me rectify it (I am sure it does work though but that's possibly not the issue). Anyway, I have sent them a message to say I think it's unfair that they haven't contacted me and that I will refund them no problem.
I suspect they won't contact me though so I'm wondering what can I do about the feedback? Just leave a comment to defend myself?
Is it the done thing to try to phone them?