DISCOVERY GIVING ME THE RUNAROUND!!

On the 18th of July my Doctor wrote a motivation to discovery to change my chronic medication to another one as the current one is giving me problems. I received a call from Discovery telling me that the motivation was not properly written or something to that effect. I told the Doctor about the feedback and he wrote another one and faxed/emailed to them. When next I called them, the particular Case Manager i spoke to told me that they did not receive the second motivation, then she gave me an email to send the motivation to. I did that on the 30th of July 2019. I called again today and I spoke to a different Case Manager who told me that the email they received didnt have any attachment. I know that that is not the truth because I scanned the document myself, it came through to my email and i forwarded it to the email address the previous Case Manager had provided. Even now when I opened my "sent items" the attachment is there. I feel that Discovery is just giving me a "runaround " and they do not want to sit and deliberate on the Doctor's request on my behalf. This is my health, and I am paying Discovery every month so I feel that it is their responsibility to do right by me. If I, as a consumer say that the product is helping me but giving me grief, they are supposed to listen to me and stop lying and tossing me around like a ball. I have emailed the motivation to a new email address that they have given to me today. My question is why was I not given this email address from the word go? I am giving this company seven days to respond to me, failing which I am taking this further than this. This is just s****ing the surface, so to speak !!