Unfair treatment

Few years ago I thought I had a higher plan only to found last that all these years I thought im on higher plan actually I was on a lower plan. When I conducted a follow up on this polmed changed their tune and said I was on a higher plan. While trying to get this out of my mind now on 3 occasions I was told that there will be money deposited into my account and that never happened instead I'm getting calls from Dr's saying that polmed is claiming that they paid me. I informed them and they said that they are going to investigate it until today no proper information from them.