1. Check the accuracy of submitted information: Make sure that the information you provide is accurate, including personal information and bank account information. If the information is incorrect, the system can't process your refund application normally.
2. Update the browser or use another browser: Sometimes, the browser version is too old or incompatible with the system, which will lead to the failure of submitting information. You can try to update your browser or use another browser to submit a refund request.
3. Contact customer service: If the above methods still can't solve the problem, you can contact customer service of Maodou New Car Network. They can help you solve problems and provide technical support.