If the confidentiality statement only prevented or barred *you* from disclosing the information, then they can disclose the questions at will. If the confidentiality statement prohibited them from disclosing the questions and your answers and they violated that agreement, you probably cannot prevent an agency to which they were already furnished from using the questions/answers (since that agency did not sign the agreement, it would not be bound by it), but you can most likely sue the person or busienss which violated its confidentiality agreement, in order to recover monetary compensation and/or for a court order preventing them from disclosing the material to anyone else.