What should I do if the secondary card accidentally charges the phone bill?

The solution to the problem of accidental charging of the secondary card is as follows:

If you accidentally charge the phone bill to the secondary card, you should first keep calm and contact the customer service department of the operator as soon as possible. Inform the customer service of the recharge error, and provide relevant information, such as the mobile phone number of the secondary card, the mobile phone number of the primary card, and the ID number. Customer service will verify the problem according to the information provided and handle the refund request. In the process of communicating with customer service, be patient, be polite, clearly explain the problem and follow the instructions of customer service. You can call the operator's customer service number or go to the local business hall for help in person. In this way, the operator will be able to help solve the recharge error and make the corresponding refund operation.