Telkom - what are you trying?

Hi, I just received an SMS from terence@dcfourie.co.za advising me that my Telkom NGN account is in arrears and a balance owed of R1455.56. I have no clue what this is for and I have not signed up for Telkom NGN, I don't have a clue of what this is. I recall that around 2013 I canceled my Telkom landline and ADSL internet line, this was because Telkom's infrastructure in my area was so old and badly corroded that they now wanted to force users to get a wireless phone line and LTE type internet connection. I am certain that when I canceled nothing further was owed on my account. I feel like this is a scam or desperate attempt by Telkom. I can see that you've added a default on my profile at the Credit Bureau and now I'm furious. I will give you a chance to respond and provide me with proof. I have been years with Mitchells Fibre and I am sufficiently happy with them.

My ID no. 8210215159085 mobile no. - 0799261153