CardCookie

I keep getting my orders from CardCookie cancelled, in face I just about have given up on them unless someone can tell me how to get orders to go through? At some point it won’t let me order from them and they eventually cancel (usually because of some kind of payment verification or something, so maybe certain credit cards won’t work on the site? I don’t know, hoping someone does know as cardcookie never gets back with me to help me out).