From resolved back to unresolved

After phoning fnb on Monday the 29th April 2019 and speaking to 4 different people I thought my issue was resolved but boy oh boy only to find out today that it clearly was not. They debited my account on the 30th April again and there was no funds available for my medical aid to go off, now who has to put up with the unpaid debit order yours truly. What's the sad part is that I only decided to check my account this evening only to see funds were debited and it was too late for me to contact them, but I could contact my medical aid coz they have people working till 8pm in the call center for cases like this, I could explain my situation to them but now I have to wait till the next day to contact fnb, and God knows for how long I have to hold just to speak to someone in their call center. I'm very frustrated right now.