1. Telephone complaint: If you are dissatisfied with the service of the credit card customer service staff of China Merchants Bank, you can make a complaint by calling the customer service phone of China Merchants Bank. When making a phone call, provide the credit card number, ID number and other relevant information so that China Merchants Bank can understand the complaints and problems. On the phone, you can explain in detail the reasons and specific details of the complaint against the customer service staff, and ask China Merchants Bank to give a reasonable solution.

2. Counter complaint: When you go to the business outlets of China Merchants Bank, you can make a complaint through the counter. In the counter, you can provide the customer service staff of China Merchants Bank with credit card numbers, ID numbers and other related information, and explain the reasons and specific details of the complaints to the customer service staff in detail. In the counter, you can ask China Merchants Bank to give a reasonable solution and keep relevant evidence and records.