I'm sorry to hear that you have lost your USDT to a fake investment company. Unfortunately, once you have sent cryptocurrency to a fraudulent company, it can be difficult or impossible to recover it. Cryptocurrency transactions are irreversible, which means that once you have sent the funds, there is no way to cancel or reverse the transaction.
If you believe that you have been a victim of a cryptocurrency scam or fraud, you should report it to the relevant authorities. In the United States, you can report cryptocurrency fraud to the Federal Bureau of Investigation (FBI) through their Internet Crime Complaint Center (IC3). You can also report the fraud to the Financial Industry Regulatory Authority (FINRA), which is a self-regulatory organization that oversees the securities industry in the United States.
It's also a good idea to reach out to your bank or credit card company if you used a credit card to make the transaction. They may be able to help you dispute the charges and potentially recover some of your funds.
In the future, it's essential to be cautious when investing in cryptocurrency or any other financial product. Be sure to do your research and only invest in reputable companies that have a proven track record. It's also a good idea to be aware of common scams and frauds and to be on the lookout for red flags that may indicate a fraudulent company.