AdventHealth.com review: I already paid off half the bill, but I feel I shouldn't pay the rest because of the lack of good services I received

I already paid off half the bill, but I feel I shouldn't pay the rest because of the lack of good services I received. The doctor had terrible bedside manner, acted as though he didn't believe me, and treated me with medications that didn't work. I feel it's unfair for me to pay off the remainder of my bill when my problem wasn't resolved. I feel what I already paid was sufficient enough. While also receiving another bill from the same hospital from the same day, for the same thing, on top of what I already owe.