In fact, the money you invested before was simply used by them for acting. The 30,000 for you is 30,000 of your 38,000, and the income from those messages is 8,000 of your 38,000. Then the average person takes advantage of the 30 thousand yuan (actually your own money), and he asks you to call back immediately. If you don't call back, you will pay a penalty every day, which is to let you borrow money in disguise and pay high interest. They didn't spend their own money.
Absolutely empty-handed, I suggest calling the police immediately.