No help from accounting department

I've been struggling for over 1 year just to sort out an amount they have charged me to much on my medical, they even agree that they have over charged me on my cover, every month they stop my policy , every month I must call them and ask to resolve the problem, every month they apologize but do nothing about it. They do nothing to call me and try to resolve the probleme , u must struggle every month to reinstate my policy that I pay every month.