Could I rate zero star or negative stars? I did ON...

Could I rate zero star or negative stars? I did ONE ultrasound but they charged me twice, I talked with the nurse and the bill department, nobody help me with that. And I changed to another hospital, UW health, it s right cross the street. And the bill (after insurance) at unity point meriter for one ultrasound is about 15 time higher than the bill for the same ultrasound in UW health after insurance. So before you go there, it s better to prepare enough money, loans, sale your house and cars.