Discovery medical health waste of time

I am totally disappointed with discovery medical aid after giving a bill of R49000 after withdrawal of my husband membership, this medical aid do not do a full investigation at send I was not truthful in my application when I app**** for his medical, I filled the application with no know medical condition. My husband visited 1 doctor in kzn and after 1 consultation she diagnosed him for schizophrenia. My husband has not signs of mental illness. After visiting the doctor she herself said she not able to diagnose him, after the consultation she claimed for medication under pmb.. Why was der no medical examination done on him, no blood test etc literally nothing. I am not prepared to pay a bill because of 1 doctor wrong diagnosis and it does not give my medical aid the right to just withdraw him like that.