Not happy

I had an operation on the 22nd July 2019. Medshield didn't pay the anesthetist in full. I phoned the medical aid and the lady that assisted me said that it was a PMB code and that she was going to put in a query. They then paid the anesthetist the full amount. The surgeon, they also didn't pay in full. I phoned and a query was submitted. I received correspondence on the 24th October 2019. I phoned the call centre today. I was told they are not paying in full. I don't understand why they didn't pay the surgeon the full amount, when the ICD-10 code was the same as the anesthetist. I am very unhappy about this.