getting cahrged more for a refund than the item cost

Hi Has anyone noticed recently that we are being charged more when a person issues a refund. An example is I sold a pair of trainers for 95 pounds, this was then put into disbursements and the person has refunded them (due to size issue) and amazon have refunded them 105 leaving me 10 out of pocket. This is down to shipping and gift wrapping, neither of which i receive the funds for.