It is indeed a very difficult problem for your ex-boyfriend to swipe your credit card and refuse to pay back the $60,000 you owe while your credit card is still in his possession. Here are some actions you can take:

1. Call the police: If your ex-boyfriend illegally used your credit card, it is a crime. You can report the crime to your local police, providing information about him and evidence of what he did. The police will investigate and take appropriate action based on the circumstances.

2. Contact the bank: You should contact the credit card issuing bank promptly to tell them about the problem and freeze your credit card as soon as possible. The bank may ask you to provide relevant evidence and launch an investigation. This way, you can prevent your ex from continuing to use your credit card and reduce your financial losses.

3. Take other measures: If your ex-boyfriend does not pay back the money, you can consider taking other measures, such as suing him, enforcing it through the court, etc. You can consult with an attorney to learn about the legal procedures and legal avenues that may apply to your situation.

In short, this is a very serious problem that requires you to take active measures to solve it. I hope the above suggestions will be helpful to you.