1, the customer delayed the payment and kept saying that he didn't receive the money. The best way is to go to court. 2. The customer delayed payment. The relationship between you is a civil legal relationship, and the disputes arising therefrom are civil disputes. There are generally three ways to solve civil disputes: negotiation between the two parties, asking a third party for mediation, and bringing a lawsuit to the court. Customers always delay giving money on the grounds that they have not received money, which shows that it is impossible for both parties to solve it in a short time through consultation or inviting a third party to mediate. In addition, consultation and mediation are not mandatory, which can only delay the time. So the best way is to bring a lawsuit to the court, and after the judgment takes effect, you can apply for enforcement. In addition, customers always say that they have not received the money. In this regard, the fact that the customer has not received the money is not a legitimate reason for not paying you the money.