Customer service very bad

I have been struggling to get the claim (of many which I had to follow up with Discovery)which was submitted on August to be processed correctly. The reason I got was, the outstanding treatment plan which I have a confirmation from Discovery that they have received. the hospital has sent several resubmission with no help from discovery. Can somebody please assist to resolve this. Apparently I am not the only person from that hospital, patients are really struggling. This is really causing unnecessary stress, which I think Discovery does not care. Please help! am now desperate, for the service that I am paying for!!!