According to your description, you were cheated by online loans for more than 50 million yuan, and it shows that you borrowed money, but it didn't arrive. In this case, you should take the following measures immediately:

1. Leave relevant evidence: Keep all information related to online loan transactions, including loan agreements, repayment records, communication records, etc. In order to serve as the basis for future rights protection.

2. Contact the customer service of the platform: get in touch with the customer service of the online loan platform as soon as possible, explain your own situation, and ask to verify the flow of loans and funds. Communicate with them by phone, online chat or email, make sure they understand your problem and ask them to provide solutions.

3. Report to the public security organ: If the online lending platform can't give a satisfactory answer or involves fraud, you can report the case to the local public security organ, provide relevant evidence and state your experience in detail.

4. Seek legal aid: if necessary, consult a lawyer or legal aid agency to understand your rights and interests and feasible legal channels. They will be able to give you professional advice and guide you to take further action.

Summary:

If you are defrauded by online loans and the funds have not arrived, first contact the platform customer service to verify the situation. If the platform can't solve it, report the case, consult legal aid and safeguard your rights and interests.

Extended data:

-Regulations of China Internet Finance Association on the Management of P2P Peer-to-Peer Lending Platform: According to relevant regulations, the platform should ensure the truthfulness and accuracy of loan transaction information, strengthen risk management and monitoring, and provide a complete customer service and dispute resolution mechanism.

-Law on the Protection of Consumers' Rights and Interests: This law stipulates the rights and interests of consumers in the process of purchasing goods or receiving services, and stipulates the ways for consumers to protect their rights, including complaints, applying for arbitration or bringing a lawsuit.

Please note that this answer is for reference only, and specific operational suggestions need to consider personal circumstances and laws and regulations.