Incorrect Authorization Request

I went to see a Dr in the rooms in Sunward Park Hospital, He requested that I get booked for a Scope, but the lady at the reception didn't get the authorization for the scope but for admission only. After the procedure they updated the authorization and I was told to make a co-payment of R2900, this is the information that should have been made available to me at the beginning so I can decide whether to continue with the procedure or not. I feel like I was ******* and I am not willing to pay this amount, they are expecting me to pay for someone else's mistake.

I have been trying to call them and no one is willing to own up to their mistake.

They also made me spend a night at the hospital for no reason after the scope.

I am completely dissatisfied with the level of service at this hospital.