Health Insurance F*ck Up

I just checked my work health insurance activity and they rejected all sorts of claims, even after my phone calls and emails clarifying that Medicare is secondary insurance, not primary. I called their customer support and it seems that they are still researching my case. They still think Medicare pays primary until 30 months or something. During our last conversation, a supervisor clearly said they were going to make a note about Medicare being secondary insurance in my files, and reprocess all messed up claims. I guess not. Now there are even more messed up claims, some for thousands of dollars, that I have to deal with with time I don’t have.