very bad customer service

I received a statement from Laxmed saying that that Ampath handed over for medical bills that are not paid. i then called my medical aid to find out what is the problem, the medical aid confirmed that there are funds available the lab is using wrong codes to claim that is way they are not paying. i then called Laxmed to explain to them so they can correct their client Ampath to correct the problem. the lady i spoke to was so rude and was shouting at me that i must just pay the money to them and i will claim from medical aid . i told her i am not going to pay she must inform their client of this issue because the medical aid is willing to pay.

What made me very angry is I took my time to find out what is the problem but she is not willing to do her part. How do I address her client (Ampath)? This lady Yvonne Schoeman is so *********** and I really wish the manger can listen to the recorded conversation for today, 09 Jan 2018 at 11:05 before he lose all his business.