For problems with the delivery of your card, it's best to contact customer service using the online form at the bottom of this page. For a technical question, you're best calling us by telephone with the following information at hand:The brand of your device: e.g. Samsung, Apple, Huawei, etc.The device type or model: e.g. Galaxy 5, iPhone 11, Huawei P30 Lite, etc.Operating system: e.g. Android 8, iOS 12, etc.The app version. You'll find this in the app under 'Menu'.