so disapointed and frustrated

My son went for a dental surgery on the 18/03/2015 at netcare n17 hosp,authorisation was obtained from the medical aid,and all codes for procedures was given to them now my surprise came when the hospital called me stating that the hospital account wasn't paid,i called the medical aid they said the was a mistake about me exceeding funds,but they will send the account for re-processing and update me,since March till today I'm the one who keeps calling them and i get the same answer with every consultants, and it's really frustrating now we can't get admitted in because of bad record of owing the hospital. I'm really not happy