Can't give correct feedback

I have been trying since the 27th of January to get a claim corrected and sorted out. Discovery rejected an Insulin level fasting test that they said I was administered insulin, as I am not Diabetic or insulin deficient in any way this would have KILLED me. I have sent countless emails following their automated process and called the call centre multiple times and they refuse to provide the correct code and say it is Lancet, call Lancet they say Discovery must give the codes. I have provided everything from Lancet that shows it was a insulin levels test not to administer insulin and they say it is not a recognised treat so not paying it as the description says insulin, but the code for cholesterol just says cholesterol so did Lancet administer cholesterol, that would be a first. Good old Discovery pushing the blame and not helping and only today when I speak to a supervisor am I told the Lancet team must call them to get the right code they can't give it to me. This has not been how it is in the past and Lancet said the same. So now I will share this with the community as this is going on since 27th of January and still no resolution. Lets see if this gets some actual correct feedback or resolution but beware, make sure you check your claims for rejections to make sure they correct before paying out of pocket. I am sure this is not the first time this has happened and most will just pay. 3 months to get told for the first time to call Lancet is that good service? Lancet is stumped and have no idea what to do either now so now what??????