Giving wrong settlement balance

I phoned the Bluebean call centre after making a payment of R7000, I wanted to settle one of my two budget transactions, just to be told that I cant settle one at a time, must settle both. I asked for a combined settlement and was giving the amount of R 8126.95. I then transfered another R 1200 as to have enough to settle both budget transactions. Then phoned after 2 days as to give the money time to show on Bluebeans side so that I can settle both budget transactions, after 3 dropped calls I was then told sorry you still need an extra R6200 to settle. HOW THE HELL CAN ONE AGENT GIVE ONE AMOUNT AND THE NEXT ANOTHER AMOUNT! I demand that you honor the settlment amount you gave me 1st! Go and listen to your recorded calls, and lets see who is in the wrong, and a simple appology wont do!