Not paying after giving authorisation

<p>I got authorisation from medical aid to go for a procesure for which they authorised 70% of the bill for hospital. When the hospital bill was given in they did not even pay 50% thereof, due to wrong codes being on invoice. The hospital amended the invoice and since 22 July after new invoice have been submitted I have had no feedback from Momentum Health other than they paid an amount, which is still less than 50%. What is the piint of getting authorisation if they do not pay the amount they said they would and now, My account is is already 60 days in arrears.</p>