I discovered last week - in store - that my M&S Credit Card Voucher had gone out of date just 10 days earlier. (Got it by returning a gift with a gift receipt one year and 10 days before.) The store staff were sympathetic but Customer Services have shown me ZERO mercy and flexibility over this. So, they get to keep the money, and I have nothing to show for it. I've asked nicely, I've explained, I've complained, I've threatened to cancel my M&S credit card...nothing but polite refusals in return, and no compensation of any kind. It's damaged my loyalty to M&S in a way I never thought possible. It's outrageous and I'm furious!