whom to write to

Dear experts I'm facing a lot of trouble with regard to misdiagnosis about my health condition which I have come to know is medically unresearched condition. Doctors make guesses and charge for it. Now we have lost a lot of money without solution and am also entangled in a court case regarding the condition. The case ironically relies on medical evidence. I want to write to govt authorities about the loss of money and mental torture this is subjecting me to. Please tell me which govt authority I must address the letter to.