Legal analysis: it is a personal problem to see how the purchase agreement is agreed. You can ask for a refund, but you should be liable for breach of contract. Credit investigation is an activity that a professional and independent third-party organization establishes credit files for individuals or enterprises, collects and objectively records their credit information according to law, and provides credit information services to the outside world according to law. It provides a platform for professional credit institutions to share credit information. The emergence of credit investigation activities stems from the emergence and development of credit transactions. Credit is a special form of value movement based on repayment, including currency lending and commodity credit sales, such as bank credit and commercial credit. Modern economy is a credit economy, and credit, as a specific economic transaction, is the product of the development of commodity economy to a certain stage. The essence of credit is a creditor-debtor relationship, that is, the lender (creditor) believes that the trustee (debtor) has the repayment ability and agrees to the promise of future repayment made by the trustee. However, when the commodity economy is highly developed and the scope of credit transactions is increasingly extensive, especially when credit transactions spread to the whole country and the whole world, it will be extremely difficult for one party to know the credit status of the other party. At this time, understanding the credit status of market participants has become a demand, and credit investigation activities have also emerged. It can be seen that credit investigation is actually produced and developed with the emergence and development of commodity economy, and it is a credit information service provided for credit activities.

Legal basis: Article 465 of the Civil Code of People's Republic of China (PRC). Contracts established according to law are protected by law. A legally established contract is legally binding only on the parties, except as otherwise provided by law.

Article 23 of the Civil Procedure Law of People's Republic of China (PRC) stipulates that it shall be under the jurisdiction of the people's court of the defendant's domicile or the place where the contract is performed.