Bankmed makes you pay for their incompetence

I visited a dentist over 2 months ago. I had my co-payment ready as Bankmed hadn’t paid in full for the previous procedure. I got to the receptionist after my procedure and they said medical aid in full so I can go. I wasn’t convinced so I waited for my statement and indeed Bankmed confirms they have paid for everything. Two months later the dentist sends an invoice for over R2000 that Bankmed paid and reversed payment without bothering to even call or email to explain what happened. Now I have to pay for an unplanned expense when I could have done that months ago. Unfortunately my employer makes me use Bankmed and I have to continue to use it. If you want inconvience and poor communication, choose Bankmed. No consideration for their member whatsoever.