All prepaid payment card publishers have to take measures to fight fraud and scams with automatic security systems. Whenever a system flags suspicious behaviour, it can result in a code or account getting (temporarily) blocked. Don’t worry - it doesn’t mean that you’re at fault! To solve the issue, please contact them at ecovouchersupport@ecopayz.com, providing your code, serial number (if available), and your invoice from us. That should be all they need to help you out quickly.