Hi guys, I have a buyer who brought an auction and the item was sent to them after payment... they emailed a few days later to say the item was faulty and they wanted a refund, i requested the item back and organised the return shipping, on inspection then arrived back we did not find the item to be faulty they had just not in fact charged it properly. they still want a refund; My question is do I have to refund the buyer their shipping if the item isn't faulty? (which means I'm out of pocket 2 lots of shipping?