Hmm...need to give extra thought on this, as I don't remember when I was needed the refund for any of the product which I ordered/purchased. We generally don't order the stuffs which we can purchase from the stores around us with some exceptions which may occur due to unavoidable circumstances, hence most probably the recent item should be cloth, because that's the only department where fitting issue may arise as we had not seen them physically.
If only refund is what question likes to know, then it should be refund of the train ticket, because few months back, my father's train got cancelled due to heavy rain, hence he got the refund of the ticket.
Which Laptop/PC you are using currently ?