Is Weihai COSCO Marine Biotechnology Co., Ltd. a fraud company?

This company is not very reliable, which gives me the feeling that it is between true and false, because I applied for a cargo ship crew and paid 2000 yuan for a satellite card. He asked me to go to Shidao to get used to fishing boats for more than ten days, and I had to pay 500 yuan for approval. I got used to it and came back, but I didn't get the money and I couldn't contact his people. I called the company and didn't get a solution. Then I asked to return the 2000 yuan, and I waited for half a month.