What should I do if I meet a black intermediary in Suzhou?

I was cheated by 200 people when I went to Suzhou Ji Bo Pioneer Park. Later, the more I thought about it, the more wrong it became. Losing money is a trivial matter. Being cheated is my IQ problem, and I decided to get my money back, so I can't encourage the swindlers. My first thought was to deal with the liar first, saying that he didn't want the job and let him transfer the money back. At first, he said that he could only get a 30% refund, and later he said that he would deduct 30 handling fees. At first, I said that the receipt didn't say so, and there was no official seal of the company, which lacked legal effect. This is the problem of their work. Later, I made it clear that I would go to the police and ask them to tell them what the process and handling fee are if I don't remit my money within half an hour. At that time, they added my WeChat and Alipay numbers and asked for qq numbers. Finally, the liar kept saying what I was afraid of. They are regular companies and are not short of money. Finally, they remitted the money back. And I really called the police at that time, but unfortunately I didn't get conclusive evidence. The police also said that they would handle the matter at the scene of the incident, and they were ready to go back. Moreover, the liar also bullied me as a foreigner. At that time, he called the address where he directly asked me to give my mobile phone to the driver's master. Fortunately, I found a place for my own interview. When looking for a job, you must leave some basic information about the interview company. In this way, evidence can be obtained in the process of alarm, and it will not be unknown.