WHY AM I STILL WITH GEMS?!

I am on the maternity benefit and done a fetal test using the bloods. GEMS rejected my claim because they said that the wrong codes were used (It literally said that the invoice was for fetal 1st trimester tests but you only work with codes and robots and cannot deviate or use discretion CAN YOU?!). After sending me outstanding bill information at eh end of april, I paid pathcare. I then sent m info to gems to get processed and they said it was rejected and did not provide an excuse for yet another one of my claims being rejected. I then called today and they told me what the issue was and got it corrected and Gems told me to send in the invoice. when i called to check if they have received my invoice as this case has been pending since april and my blood test was done in march, they told me their documents have to be in the system for a minimum of 48 hours before they have a look at it. How does anything get done at this hell-hole institution!!? GEMS is a poor option if you are pregnant. Their agents simply cannot listen to reasoning and assist. Why cant they 1) give proper reasons for why things are being rejected so that it can be sorted out? 2) actually escalate matters that have been in the system for months?