I gave the new bank acc no, but they still took it off my old acc

I spoke to an agent on the 25th of oct, he assured me when i gave him the new bank account number that the debit order will go off my new account, I checked this morning, they are taking the money off my closed acc, and there is now fees for the returned debit order, and Im sure vodacom is adding onto my account for the returned debit order, this is not acceptable, if your agents are *********** please fire them and hire someone that is willing to work, I have screen shots of my post I originally placed on facebook, I have reference numbers and I have a screen shot of the call I received when he called me to assist with the changing of the account number!! I hereby request a refund for my returned debit order fee, and they need to credit the extra amounts they have now added onto my vodacom account,