No accountability! Awful service @ my expense

I am absolutely disgusted at the service from Discovery Health... My December premium = R764, my January 2016 = R1734, which is more than double. I call the call centre and spoke to an agent Nolu, who tells me that there is documentation that was never submitted. When I query about who this was sent to, she has no clue, and tells me that there is nothing she can do, all she sees is broker codes. She can't trace the email address, the name of broker - whom I know nothing about, nor contact details, and then I was given a call centre number for Discovery Life for me to investigate myself. Apparently and sms was sent, which I know nothing about. Not to mention the silent treatment I received from time to time while I seek for help on this matter. I've always heard about Discovery's bad service, now I have first-hand appalling experience. I still cant get over it. I'm shocked to say the least! There is absolutely no regard or concern for the inconvenience I experience as a result of some Discovery broker who Discovery Health loaded on my policy without my consent. Mistakes happen all the time, the least you can do is own up and fix it, it cant be too much to ask. Really!!!