Charged for product i declined

Hi.<br> <br> About two/ three months ago (I think), an agent called me and told me about a debt protection plan. I then asked her to only sign me up for my overdraft and not the credit card. However for the past three months, I've been getting billed R254.00 for something I specifically said I do not want. I want this cancelled and money refunded to me ASAP. I worked for a call centre agent and this is classified as *****. Surely there is a Quality Assurance department in FNB to listen to these type of calls where agents authorise products that customers did not sign up for.