A breach of duty also allows you to sue a lawyer. This kind of malpractice happens when the lawyer violates his or her responsibilities to you by settling the case without your approval, not preparing the case for trial, lying to you, abandoning your case, misusing funds you provided for court costs, or misusing funds owed to you (such as a settlement amount). The attorney has not done what other attorneys would do in this type of case.
If the attorney violated proper ethics, you can file a grievance with the ethics committee of the state bar association, which ensures all attorneys are in good standing to renew their licenses. The attorney could be disbarred or directed to pay you compensation.
You can refer to Section 35 of the Advocates Act, which lists malpractices.