I've got a chase card, they used to lock it every time I'd buy bike parts from the UK. But they've been real good at keeping notes when I call them, and I haven't had a problem since. I use my chase card with Gandi too, and I would guess they lock you up because Gandi is a foreign co, and you're card doesn't see a whole lot of action in Paris. One call to chase telling them you expect to make more purchases from Gandi should fix it.