Years ago when I shopped with QVC I always had this problem, the money was reserved by Visa, when QVC took the money for some reason it would reserve again, so say I'd bought something for £20 a few days later when they claimed their money it reserved £20 again. Would QVC accept it? absolutely not. It took them years to admit it when a snotty git in their finance team once said "oh er yes, if an item gains authorisation it can ask for it again fifteen minutes later, but we don't take it twice!" I said "I know that, but it doesn't really matter because I can't touch my own money for a week, even though it was your mistake, I'm still getting penalised for it! it's not on!" I even complained to the bank it got that bad and told them, why isn't the consumer protected? I know the money is put on hold for a week so the retailer can claim their money, I said why can't the bank give them four days instead of seven to collect it, because when they make a mistake it's not fair that the customer suffers, why should the customer have to wait a week for the money to drop back into their account when it's not their fault? She "understood" but I knew nothing would get done.