************* & poor customer service

I was scheduled for a procedure on 02/12/2022 and got the pre-authorization number on 01/12/2022 and as the hospital was in the network I had no co-payments. Days after my procedure then discovery health sends me another authorisation letter with the same pre-authorisation number as the previous one now telling me that I have to pay an amount. I have been calling countless times and using my airtime to solve an issue not caused by myself.