You can do the following:
1. Go to the court to retrieve the case file, get your power of attorney to the lawyer, and confirm that the signature is false. There should be some information, such as who gave the lawyer's fee and who provided the evidence of the case.
2. Complain and report to the judicial bureau where the lawyer is located with evidence, and ask the judicial bureau to transfer the crime to the judicial organ if it is found. And ask the lawyer's law firm for compensation.
3. Report to the court that the lawyer is suspected of committing a crime in false litigation and request to be transferred to the public security organ.