I work for a company who also only offer an exchange or gift vouchers - the law states that a refund does not have to be given unless the product is faulty or faulsly advertised. But we do refund if bought in error and bought back the same day. I would contact their head office its amazing how much of a difference it will make. The company should stick to the same rules but at the same time it might be 'common sense' policy on there part and one shop cares more about giving refunds than the other lol. Seriously give the H/O a ring - might be worth not mentioning the first refund though, thats the whole reason for not giving them really.