If the supermarket waiter's attitude is not good, you can take the following measures to complain:1Lodge a complaint directly with the supermarket management. You can find the person in charge or manager of the supermarket, explain the situation to them, and request a solution. This method is often the most direct and effective because managers can directly step in and solve the problem. 
2.Leave feedback. Many supermarkets have a special feedback box or **, you can leave your comments and suggestions on the supermarket**, or write your comments on a small piece of paper and put them in the feedback box. This approach can help supermarkets understand your needs and problems and take action to improve them. 3.Seek help from consumer associations. If you think that a problem with the waiter's attitude at the supermarket has seriously affected your shopping experience, you can turn to your local consumer association for help. The consumer association can file a complaint with the supermarket and help you solve the problem. 
4.Post a complaint on social media. If you use Social**, you can post a complaint about the attitude of the supermarket attendant on the platform. This approach may cause concern to other consumers and prompt supermarkets to take improvement measures. Regardless of the approach, be sure to remain calm and polite when complaining, and describe the problem in as much detail as possible. At the same time, it is necessary to keep relevant evidence, such as shopping receipts, **or **, etc., so that you can provide proof when needed.