Problems with maternity benefits for months - Still not resolved! -Ref ***

I am extremely disappointed in the service I received from Imperialmed! For literally months now I have been phoning and emailing them trying to get this sorted out. Every time I get a different excuse from their side, then I'm told that they will resubmit my query and wait 5 days. I wait, I phone again and then still, nothing has changed. The "problem" is that I am expecting twins. The Dr used the ICD10 code for twin pregnancies, but they wanted him to use the code for single pregnancy. I have spoken to the medical aid countless times, I have spoken to the Dr myself to change the code. He says he is using the right code and has not had trouble with it before. In the meantime the medical aid has EXHAUSTED MY DAY TO DAY BENEFITS paying the gynecologist for all my appointments thus far. I am almost 6 months pregnant. Went back to Imperialmed, they said it will all be resolved before 8 Sept as that was the pay run date, and that they will change the Care plan on their side. When I phoned again, they are back to saying the Dr needs to use a different code and change the statement. Also this weekend I received another email from them saying my claim was unsuccessful because my benefits are exhausted - they are still trying to take it out of my Day-to-Day! I spoke to Thembela who I was told is the team leader. She gave me her email address, but when I emailed her, she simply didn't respond. I am sick and tired of this now as I can't even go to the GP or buy medicine because the medical aid is clearly in no hurry to resolve my query and transfer the money back to my day-to-day benefits. I am also stressed out that if this is the service I am receiving now, how do I know if they will pay when it comes to the delivery (what about if I go into pre-term labor, I am expecting twins after all?)