Caller: A broker company

My phone no. is on the do not call register but still this telemarketer from a brokers company still tried to push a sale/info onto me. I made it clear I was not interested and wanted my no. removed from their database but she kept continuing. I asked to speak to a supervisor as my no. is on do not call register and telemarketer has refused to remove my no. from their database but I was then hu on.