A refund system has been brought up many times in the past but it doesn't appear to be something the developers are interested in implementing, at least for now.

I would question the belief that buying an earring instead of a ring will be the difference between success and failure in Savage. though. The difference in stats between the two is tiny (assuming you're referring to the fending accessories). If your static is having issues, I doubt that swapping an earring for a ring is going to be a noticeable improvement.