Told Account is Settled, now Running DEBIT!

Paid my Nashua Mobile Account EFT in December Last year,<br> then Nashua Mobile Ran debit order for the same amount. Phoned their call center, and the agent advised to go to the bank, stop the debit order (which cost ME money!), and get it reversed.<br> Then received Emails and SMS's from the Nimble Group wanting Payment. I then resent the proof.<br> <br> As per Genie De Wet on the 22/01/2015, my Nashua Mobile Account was settled, and I do not know anything.<br> Afterwards received email of Cession for my account to Norman Bissett and Associates.<br> They then send messages wanting me to pay the R466.79, which I rep**** with the proof of payment where I paid it in December Last Year. <br> I did not receive a reply to that.<br> This morning I received an SMS saying that they will be running a Debit order to recover that amount.<br> I sent them another email with the proof of payment, and told them that I DID NOT authorise the debit order.<br> Phoned the *** Number, the agent said there is nothing he can do, and I must go to the bank and stop the debit order. The call was then cut.<br> <br> Tried to call Carol Fourie or Genie De Wet on ***, and the call keeps on getting cut after reception puts me through to them