How can I get Medicare to accept responsibility for currently submitted claims that do NOT belong under the worker's compensation umbrella?

Medicare has been denying my medical claims for my neck and right knee. The claim that "Your workers' compensation insurance plan has the on-going responsibility for medicals (ORM). Your workers' compensation insurance plan is responsible for paying the 42 claims now pending. I have sent documentation from the w.c. insurance company stipulating they ARE responsible for treatment to the "lower back" and the "upper right extremity". This ungodly situation has been on-going since July 2021.