Double debit order!!!!!!

<p>My debit order is set to go off every last day of the month. Last month they debited my account on the 6th of April 2017. I received an SMS that the deit order could not go through due to insuffisient fund in my account. On 25 April 2017 I made an EFT payment of the outstanding amount. Right after I have done the payment I have phoned 082 111 to speak to a consultant to let them know that payment was done and they have to update their system. His response was that all is updated and logged onto the system and my account will active now. Today (3 May 2017) I received an debit order notification from my Bank only to see that Vodacom has debited my account again! Once again it was not the last day of the month! I am furious as I have to wait 7 - 14 working days for my money to be paid back. I have stuff to pay and cannot wait that long! I feel that this is unfair as this was not my mistake! My contract expires 11 May 2017 and I'm sad to say that I will not renew my contract with Vodacom ever again!!!</p>