Telkom double debit order!!

Double debit order from Telkom!! I have 2 cell phone contracts with Telkom (business). The one account was successfully debited for R2100.00 on the 25th of September 2015. The other account was not debited successfully and as a result my contract was disconnected. Unsuccessful debit amount: R1950.50 On the 16th of October 2015, Telkom's private collections department debited an amount of R1500.00 from my account, and then a further R2359.50. Total debited: R3859.50 Now this is where it get's so frustrating :/ I received a text message yesterday confirming that on the 26th of October 2015, an amount of R3859.50 (same as above) will be debited from my account. This means that they intend of debiting the same amount thats already gone off again on Monday next week! When I enquired with a customer service agent, they mentioned that collections takes time to confirm with Telkom that the debit order has been processed, so this means, as long as they do not receive confirmation, they will still be going ahead with debiting my account on the 26th. I told the customer service agent that I cannot afford for this amount to go off again, especially because collections have already debited the