I am no one to be messed with

How is it possible that they ask you about your pre existing conditions that was provided to them by discovery, I disclosed heartburn that I have without there ever being diagnoses to confirm the origin, now they decline me all medicine to do with that, I waited 3 months and still they extended and exclude it for a year, yet there was no previous notes made about this new condition not diagnosed by any doctor, then they waste your money on covering you for maternity and prostate who again that won't be used by a 53 year old female, this company are ********** , those needs to be taken to court