"I'm here to press charges. I'm angry and I will go there," the singer said over a lawyer's phone on Wednesday.
Her emotional statement came as a Los Angeles judge ruled Spears can choose her own lawyer in her fight to end the controversial legal arrangement.
A conservatorship is granted by a court for individuals who are unable to make their own decisions.
Conservatorship abuse can involve financially exploiting or imposing excessive personal restrictions on someone in your care.