DES MOINES, Iowa (AP) — The Iowa attorney general’s office has filed a lawsuit against a cosmetology school chain, accusing it of defrauding students. The Des Moines Register reports the lawsuit filed Thursday in Polk County District Court accuses the La’ James chain of cosmetology schools of fraudulent practices. It says students experience a high instructor turnover that results in teacher-less classrooms and inconsistent education.

The attorney general’s office also argues that the beauty school chain unfairly charges students who fail to graduate by an arbitrary deadline. Depending on which program they select, students pay at least $4,750 and up to $18,660 in tuition. A lawyer representing the beauty school chain says his client denies any wrongdoing.

The beauty school chain has several locations in Iowa and one each in Illinois and Nebraska.