Coehersed to make payment

i have cancelled my telkom mobile account after they charged me R200 penalty fee for a R99 subscription payment that my bank did not honor i called the the telkom callcenter and spoke with an agent who told me i was charged a penalty fee and if i need to cancel the contract i need to pay that penalty fee plus the outstanding R99 subscription since I was on a month to month contract i instructed the agent to ensure that at no circumastance was my bank account to be debited again , as i will do a transfer to settle the amount due to my suprise telkom went ahead and tried debting my account and failed and charged me another penalty fee again i will not be settling this amount as I Cleary instructed the Telkom agent to ensure no debit order is done as my bank wont honor any debit orders for the 8years i have been contracted to telkom not once was there a penalty fee on my account to who ever is responsible please instruct MBD to stop abusing me by calling and sending sms as i do not owe telkom R190, what i owed i paid would really appreciate a prompt resolve to this matter