If you are unable to withdraw money from a US exchange, there are a few steps you can take to try and resolve the issue:

1. Contact customer support: The first thing you should do is reach out to the exchange's customer support team. They may be able to provide assistance and troubleshoot the issue with you.

2. Check your account balance: Make sure that you have sufficient funds in your account to withdraw. If your balance is lower than the withdrawal amount, you will not be able to withdraw funds.

3. Verify your account: Some exchanges require users to verify their identity before they can withdraw funds. Make sure that your account is fully verified and that all necessary documentation has been submitted.

4. Check withdrawal limits: Some exchanges have daily or weekly withdrawal limits in place. Make sure that you are within these limits when attempting to withdraw funds.

5. Try a different withdrawal method: If you are having trouble withdrawing funds using a particular method, try using a different method such as bank transfer or a different cryptocurrency.

6. Look for any system notifications: Sometimes exchanges may have technical issues or maintenance periods that can affect withdrawals. Check for any system notifications or updates from the exchange.

7. Consider reaching out to regulatory authorities: If you have tried all the above steps and are still unable to withdraw funds, you may want to consider reaching out to regulatory authorities or consumer protection agencies for assistance.

It's important to exercise caution when dealing with exchanges and ensure that you are using a reputable and trustworthy platform. If you are still unable to withdraw funds, consider seeking legal advice or assistance from a financial professional.